For the two similar cuboids A and B,
surface area of A : surface area of B = 16 : 2 then the ratio of their volumes is equal to volume of A : Volume of B = 16√2 : 1.
As given in the question,
Given : Two similar cuboids A and B,
Let x , y , and z be the length , width and height of cuboid A
And l, b, h be the length , width , and height of cuboid B.
As both the cuboids are similar their sides are in proportion.
k is the constant of proportionality then,
x= kl , y = kb, z = kh
Surface area of A : Surface area of B = 16 :2
⇒2k²(lb +bh +hl) : 2(lb +bh +hl) = 16 : 2
⇒k² = 16 :2
⇒k = 4 : √2
Now volume of A : Volume of B
= xyz : lbh
= k³lbh : lbh
= k³
=( 4 : √2)³
=64 : 2√2
= 64√2 : 4
= 16√2 : 1
Therefore, for the two similar cuboids A and B,
surface area of A : surface area of B = 16 : 2 then the ratio of their volumes is equal to volume of A : Volume of B = 16√2 : 1.
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what is 5\sqrt(3ft *3\sqrt(12))
The solution of 5√3 × 3√12 = 30√3.
What is square root?Square root of a number is defined as the number in which the multiplication by itself gives the original number. That is the square root of 9 would be = 3 in which when multiplied by itself gives the original number being 9.
Other examples include √ 4 = 2, √ 25 = 5, √100 = 10.
To simplify the give expression;
5√3 × 3√12= 5√3 × 3√4×3
= 5√3 × 3×2√3
= 5√3 × 6 √3
= 30√3.
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Which of the following equations does the graph below represent?
A. 3x + 7y = 21
B. -3x + 7y = 21
C. x + 7y = 21
D. -3x + y = 21
Answer:
B
Step-by-step explanation:
if x = 0 ; y = 3
if x = -7 ; y = 0
A 0 + 7(3) = 21
0 + 21 = 21
21 = 21 (ok)
3(-7) + 0 = 21
-21 = 21 (false)
B
0 + 21 = 21
21 = 21 (ok)
(-3)(-7) + 0 = 21
21 = 21 (ok)
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Pine Street, Rector Street, and Taylor Street intersect to form a triangular-shaped park as shown.
(picture below)
What is the correct order of the lengths of the streets from longest to shortest?
Answer:
Rector, Pine, Taylor
Step-by-step explanation:
The opposite side of each angle's lengths depend on how large the angle is. The larger the angle is, the longer the side. Because the angle opposite to Rector is the greatest, then it is the longest. Thus, then follows Pine and Taylor. Hope this helps!
In 5-10, match each expression with the correct value
Trignometric equation can be used to answer this:
What is trignometric equation?A trigonometric equation is any equation that contains a trigonometric function. Up until now we have introduced trigonometric functions, but not fully explore them. In the lessons within this SparkNote on trigonometric equations, we'll learn exactly how to solve trigonometric equations.As mentioned in Trigonometric Identities, a trigonometric equation that holds true for any angle is called a trigonometric identity. There are other equations, though, that only are true for certain angles. They are generally known as conditional equations, but in this text we'll just call them equations. We'll learn some techniques for solving general equations, as well as how to derive an infinite number of solutions to an equation based on a single solution to that equation.acc to our question-
5. cos(75)= 2-√3
6. tan(22/7)= 1+√2
7. sin 3π/6= √2-√√2/2
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Maria deposits $1,400 into the Park Avenue Bank. The account pays 2.5% annual interest compounded semi-annually. What is her ending balance after 3
years? Round to the nearest cent (2 digits after the decimal point).
The ending balance is
The ending balance after 3 years is $1508.34
What is compound interest?
The interest that is paid on both the initial principal and the accumulated past interest is known as compound interest.
The compound amount and compound interest are calculated by:
Compound amount, [tex]A=P(1+\frac{r}{n} )^{nt}[/tex]
Compound interest, [tex]I = A - P[/tex]
where, P is the principal amount
r is the rate of interest(in decimal)
n is the number of times the interest is compounded annually
t is the time.
Given, Principal amount, P = $1400
rate of interest, r = 2.5% = 0.025
n = 2 (compounded semi-annually)
t = 3 years
Then, the compound amount is calculated by:
[tex]A=1400(1+\frac{0.025}{2} )^{2*3}\\[/tex]
or, [tex]A=1400(1+0.0125 )^{6}\\[/tex]
or, [tex]A=1400(1.0125 )^{6}\\[/tex]
or, [tex]A=1508.34[/tex]
Therefore, the ending balance is $1508.34
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What line is perpendicular to the line y= -1/2x + 8
Answer: y=2x+8
Step-by-step explanation:
you take the reverse of the slope being 2 including the negative.
What is the equation of the line that passes through the point (6, 4) and has a slope 2/3
The equation of line passes through the point (6, 4) with a slope 2/3 is, y = 2/3x
Given,
The points which the line passes through = (6, 4)
Slope = 2/3
We have to find the equation of line;
Linear equation;
Y = mx + b is one way to represent a linear equation.
A point's coordinates are x and y.The slope is m.The position of the point where the line crosses the y axis is represented by the integer b, which is the ordinate to the origin.Here,
x is 6 and y is 4
Slope, m is 2/3
Then,
Substitute the values in y = mx + b
Here,
y = mx + b
4 = 2/3 (6) + b
4 = 12/3 + b
4 = 4 + b
b = 4 -4
b = 0
Then,
The equation of line is, y = 2/3x + 0
That is,
The equation of line passes through the point (6, 4) with a slope 2/3 is, y = 2/3x
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Given CB || ED,;CB=ED prove CBF= EDF using isometric ridged transformation outline the necessary transformation to prove CBF = EDF using a paragraph proof. Be sure to name specific sides or angles used in the transformation and any congruency statements
The given triangle is rotated about 180 degrees and as such, we can say that the triangle CBF is congruent to the triangle EDF.
How to prove congruent angles?
From the attached image, we see that CB is parallel to ED. We also see that the transversal lines are BD and CE.
The point E will become the image of point C by a rotation of 180° around the point F.
Now, the point D will be the image of point B by a rotation of 180° around the point F.
Rotation is a type of transformation and as such ΔEDF will be the image of ΔCBF.
Therefore we can conclude that ΔCBF ≅ ΔEDF
The second way to prove this congruency is as follows;
∠B = ∠D (Due to the fact that alternate angles are congruent)
∠C = ∠E (Due to the fact that alternate angles are congruent)
Now, since CB ≅ ED , then it means that ΔCBF ≅ ΔEDF by SAS congruency postulate
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attachment above please
The continent of Australia is 8,508,238 sq. km while it's largest island, New
Guinea, is 787,878 sq. km.
How much larger is Australia?
OA) 9,296,116 sq. km
O B)
7,720,360 sq. km
OC) 7,720,260 sq. km
OD) 7,719,360 sq. km
Answer:
B) 7,720,360 sq. km
Step-by-step explanation:
8,508,238 - 787,878 = 7,720,360 sq. km
Hope this helped :)
Find the GCF of 21 and 28.
Answer: 7
Step-by-step explanation:
Answer:
7 is the GCF of 21 and 28
Step-by-step explanation:
The GCF of 21 and 28 is 7. To calculate the greatest common factor (GCF) of 21 and 28, we need to factor each number (factors of 21 = 1, 3, 7, 21; factors of 28 = 1, 2, 4, 7, 14, 28) and choose the greatest factor that exactly divides both 21 and 28, i.e., 7.
Which two operations are needed to write the expression that represents "five less than the quotient of a number and
three"?
The two operations that are needed to write the expression that represents "five less than the quotient of a number and three" are Division and subtraction.
What is the quotient?
A result is obtained by dividing two amounts.
The quotient is the result of a division.
The term "less than" represents subtraction.
So, the two operations that are needed to write the expression that represents "five less than the quotient of a number and three" are Division and subtraction.
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One spring day, Harper noted the time of day and the temperature, in degrees
Fahrenheit. Her findings are as follows: At 6 a.m., the temperature was 58° F. For the
next 3 hours, the temperature rose 4° per hour. For the next 5 hours, it rose 1° per
hour. The temperature then stayed steady until 6 p.m. For the next 2 hours, the
temperature dropped 1° per hour. The temperature then dropped steadily until the
temperature was 70° at midnight. On the set of axes below, graph Harper's data.
The graph that shows Harper's data about temperature and time is shown below .
The graph is a relation that represents the relationship between two variables on the x and y axis .
In the question ,
Harper's data of time of day and the temperature, in degrees Fahrenheit is given,
the temperature at 6 a.m. = 58° F
for the next 3 hours the temperature rose 4° each hour means
in 3 hours it will rise 12°
So , the temperature at 9 a.m. = 70° F
For the next 5 hours, it rose 1° per hour which means
in 5 hours it will rise 5°
So , the temperature at 2 p.m. = 75° F
The temperature then stayed steady until 6 p.m. which means
temperature at 6 p.m. = 75° F
For the next 2 hours, the temperature dropped 1° per hour , which means
temperature at 8 p.m. = 73° F
the temperature at midnight = 70° F
So , from the above data the graph is shown below .
Therefore , The graph that shows Harper's data about temperature and time is shown below .
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Classify the polynomial by its degree: 4m³-9x² + 10
A) 0
B) 1st
C) 2nd
D) 3rd
E) 4th
Swimming, Manufacturing, and Painting
Problem
Variables to use
Equation
Tyler swims at a constant speed, 5 meters every 4 seconds.
A factory produces 3 bottles of sparkling water for every 8 bottles of plain water.
A certain shade of light blue paint is made by mixing 1 ½ quarts of blue paint with 5 quarts of white paint.
For each of the previous three situations, write an equation to represent the proportional relationship.
The equations that represent the proportional relationships between the variables are as follows:
Problem Variables to use Equation
1. Tyler swimming Time / Distance D = 1.25t
2. Factory production Total quantity, Q, Q = 3s + 8p
and Sparkling / Plain
3. Paint mixture Blue / White Paints 6q = 1.5b + 5w
What is an equation?An equation models a mathematical statement in which two or more expressions (involving numbers, variables, and operands combined) are equated using the equation symbol (=).
Tyler:Speed = 5 m/4s
= 1.25 m/s (5/4)
Swimming equation: D = 1.25t
Where D = distance and t = time spent.
Given the speed and time, we can find the swimming distance covered by Tyler.
Factory:
Bottles of sparkling water = 3
Bottles of plain water = 8
Ratio = 3:8
Production equation, Q = 3s + 8p
Where Q = total quantity, s = sparkling water, and p = plain water
Paint:Blue paint = 1 ½ quarts
White paint = 5 quarts
Ratio = 1.5:5
Production equation, 6q = 1.5b + 5w
Where 6q = 6 quarts, b = blue paint, and w = white paint
Thus, using the equations, we can use the known variables to find the unknown variables.
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The doubling period of a bacterial population is 20 minutes. At time t=120 minutes, the bacterial population was 90000.
What was the initial population at time t=0?
Find the size of the bacterial population after 3 hours.
The initial population of the bacterial population at time t = 0, can be found to be 1,406.25.
The size of the bacterial population after 3 hours is 720,000.
How to find the bacterial population?The doubling period of the bacterial population is said to be 20 minutes. The number of doubling periods in 120 minutes is:
= 120 / 20
= 6 doubling periods
The initial population is:
= Population at 120 minutes / 2 ^ number of doubling periods
= 90,000 / 2⁶
= 1,406.25
The bacterial population at 3 hours is:
= Bacterial population at t = 0 x 2 ^ number of doubling periods in 3 hours
= 1,406.25 x 2 ^ (180 minutes in 3 hours / 20)
= 1,406.25 x 2⁹
= 720,000
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here are the first 5 terms of an arithmetic sequence, 2,6,10,14,18... is 86 a term in this sequence, you must give a reason for your answer
Answer: Yes
Step-by-step explanation:
Because if you keep going it will reach 86, since it's added by 4, so 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 70, 74, 78, 82, 86.
10. Chelsea had completed 2/3 ofa 5-mile race when
her shoelace came untied. How many miles had
Chelsea completed at that point?
Answer:
3.3 miles with a bar notation on decimal 3
Step-by-step explanation:
convert 2/3 to decimal (2 divided by 3)
multiply 5 by decimal of 2/3
add bar notation on repeating decimal
12) m/GOP = 80°, m/ROP
and m/ROG= 32x + 4. Find x.
R
Q
= 3 +59x,
G
By using linear pair, we have found that the value of x is 3.
What is linear pair?Linear pairs of angles are produced when two lines intersect each other at a point. The sum of angles of the linear pair is always 180 degrees.
Given that Angle QGP = 80°, Angle ROP = 3 + 59x and Angle ROG= 32x + 4. Find x.
Therefore, we can see that Angle ROG and Angle QGP lie in a straight line.
Thus, by linear pair
Angle ROG + Angle QGP = 180
80° + 32x + 4 = 180
32x = 100 - 4
x = 96/32
x = 3
Hence, the value of x is 3.
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Rebecca wants to buy a new phone. She has already saved $110 and received a gift of $50 from her grandmother that she added to her savings. She plans to earn the rest by selling necklaces for $5 each. The phone she wants to purchase costs $485. Write an equation that represents how many necklaces Rebecca will need to sell in order to have enough money to get her phone.
Answer:
5x=325+160
Step-by-step explanation:
this was very easy but i guess with so many words it could confuse people
5x + y = 8
2x + y = 5
Answer:
x=1 y=3
Step-by-step explanation:
By looking at the equations, you can use substitution
Set the equation equal to y
y=-5x+8
y=-2x+5
Then put equation together
-5x+8=-2x+5
Move numbers over
3x=3
x=1
Put x back into equation
5+y=8
2+y=5
y=3
The function C(x)=−21x+2025 represents the cost to produce x items. What is the least number of items that can be produced so that the average cost is no more than $24?
The least number of items that can be produced so that the average cost is no more than $24 is 95.
According to the question,
We have the following information:
The function C(x)=−21x+2025 represents the cost to produce x items.
Cost should be no more than $24.
So, we have the following inequality to find the number of items:
-21x+2025 ≤24
Subtracting 2025 from both sides:
-21x≤24-2025
-21x ≤ -2001
Dividing both sides by -21:
x ≤ 2001/21
x ≤95.28
Hence, the least number of items that can be produced so that the average cost is no more than $24 is 95.
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1/3 divide by 4 3/4 simplest form
Step-by-step explanation:
first put 4 3/4 into a improper fraction ---> 19/4
you get 19/4 because 4 is equal to 16/3 plus the 3/4
then you will do keep, flip change so it becomes multiplication
so instead of 1/3 divided by 19/4 it will be 1/3 x 4/19 then
multiply it out to get 19/12
Elijah read his book from 4:30pm until 6:00pm. He read 1 chapter every 10 minutes.
How many chapters total did Elijah read?
Answer:
he read 9 chapters
Step-by-step explanation:
4:30 pm to 6:00 pm is 1:30 hours, which is 90 minutes
90/10=9
It takes Abby 3 hours to drive from Ashdown to Bridgeton at an average speed of 60 mph.
She then drives 30 miles from Bridgeton to Carton at an average speed of 40 mph.
Assuming Abby doesn't stop, what is her average speed from Ashdown to Carton to 1 dp?
The average speed for the given situation is 56 mph.
Given that, Abby 3 hours to drive from Ashdown to Bridgeton at an average speed of 60 mph.
What is the speed?The speed formula can be defined as the rate at which an object covers some distance. Speed can be measured as the distance travelled by a body in a given period of time. The SI unit of speed is m/s.
Now, distance = Speed × Time
= 60 × 3
= 180 miles
She then drives 30 miles from Bridgeton to Carton at an average speed of 40 mph.
Now, Time = 30/40
= 0.75 hours
Total time =3+0.75=3.75 and total distance =180+30=210
Then average speed = 210/3.75
= 56 mph
Therefore, the average speed for the given situation is 56 mph.
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Write an algebraic expression that represents each purchase.
a. Dr. Lin bought x number of soccer balls and 4 baseballs.
b. Nestor, Felix, Peter, and Hao are on a baseball team. They each bought a baseball and x pairs of sweat socks.
26. Suppose x has the same value in both of the expressions you wrote for 25. Are the two expressions you wrote for 25 equivalent? Explain.
27. Sophia says that the algebraic expression 4
4
5x, where x represents the cost of a baseball, describes the cost of a soccer ball. Do you agree? Explain.
1. An algebraic expression that represents each purchase is as follows:
a) 15x + 24b) 5x + 24.2. Supposing that x has the same value in both expressions written above, the two algebraic expressions are not equivalent because the slope of expression A is greater than the slope of expression B.
3. The cost of a soccer ball in relation to the cost of a baseball cannot be represented by the algebraic expression 4 + 5x because it is given that the cost of a soccer ball is $15, and no number can substitute the x variable to equate the two.
What is an algebraic expression?An algebraic expression is a combination of terms (variables and constants) using the mathematical operations of addition, subtraction, multiplication, division, etc.
a) 15x + 4(6) = 15x + 24
b) 4(6) + 5x = 24 + 5x or 5x + 24
c) Cost of a soccer ball = $15
Cost of a baseball = $6
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Question Completion:Soccer balls = $15 each
Baseballs=$6 each
Sweat socks =$5 per pair
1/3a^2+a=0
It's rather urgent, please or else I will fail my semester...
The solution of the equation given as 1/3a² + a=0 is a = 3
How to determine the solution to the equation?From the question, we have the following equation that can be used in our computation:
1/3a^2+a=0
Rewrite the equation properly
So, we have
1/3a² + a=0
Multiply through the above equation by 3
So, we have the following equation
3 * (1/3a² + a) =0 * 3
Evaluate the products
So, the equation becomes
a² + 3a = 0
Next, we divide through the equation by the variable a
This gives
a + 3 = 0
Subtract 3 from both sides of the equation
i.e. Add -3 to both sides of the equation
a = -3
The above equation cannot be solved further.
So, we leave it like that and stop solving
Hence, the solution to the equation is a = -3
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A study conducted by the Institute of Education Sciences from 1992 to 2003 found that about 22% of adult Americans had low levels of literacy and were “not able to locate information in text,” could not “make low-level inferences using printed materials” and were unable to “integrate easily identifiable pieces of information.” If a simple random sample of 50 adult Americans is collected, what is the probability that more than one-fourth of them will have low levels of literacy as described above?
The probability that more than one-fourth of them will have low levels of literacy as described above is 0.3043.
What is probability?
The area of mathematics known as probability deals with numerical descriptions of how likely it is for an event to happen or for a claim to be true. A number between 0 and 1 is the probability of an event, where, broadly speaking, 0 denotes the event's impossibility and 1 denotes its certainty.
Given: A study conducted by the Institute of Education Sciences from 1992 to 2003 found that about 22% of adult Americans had low levels of literacy and were “not able to locate information in text,” could not “make low-level inferences using printed materials” and were unable to “integrate easily identifiable pieces of information.”
A simple random sample of 50 adult Americans is collected.
n(p) = 50(0.22)
n(1 - p) = 50(1 - 0.22)
The CLT would hold here.
n = 50
p = 0.22
p cap = 0.25
The test statistic, z = (p cap - p) / (√p (1 - p) / n)
z = (0.25 - 0.22)/(√0.22(1-0.22)/50)
z = 0.51
The p-value is 0.3043.
Hence, The probability that more than one-fourth of them will have low levels of literacy as described above is 0.3043.
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Two people are jogging around a circular track in the same direction one person can go to completely around the track in 21 minutes the second person takes 18th if they both start running in the same direction at the same time how long will it take them to be together at this place if they continue to run
Answer:
n * 21 = m * 18 one runs n laps and one runs m laps to again be together at the same place
7 n = 6 m divide by 3
one runs 7 * 18 = 126 min
the other runs 6 * 21 = 126 min
After 126 min they will be together at the start
Solve the equation n x 5 = 5000 explain you solution
Answer:
1000
Step-by-step explanation:
n x 5 = 5000
n = 5000/5
n = 1000