Answer:
How is this number written in scientific notation? A. 1.429 x 10.
The number 0.001429 is written in scientific notation as [tex]1.429*10^{-3}[/tex].
Here, the density of oxygen is 0.001429 grams per cubic centimeter.
What is scientific notation method?
Scientific notation is a way of writing very large or very small numbers.
A number is written in Scientific notation when a number between 1 and 10 is multiplied by a power of 10.
The value of 0.001429 in scientific notation is written as;
⇒[tex]0.001429 = 1.429*10^{-3}[/tex]
The number 0.001429 is written in scientific notation as [tex]1.429*10^{-3}[/tex].
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A number of dimes and quarters are worth $2.55. If the number od dimes and quarters were interchanged the resulting new amount would be $2.70. How many of each kind of coin were there before the interchange?
Answer:
8 dimes
7 quarters
Step-by-step explanation:
Let number of
Dimes = x ; quarters = y
10x + 25y = 255 ___(1)
25x + 10y = 270 ___(2)
From (1)
10x = 255 - 25y
x = (255 - 25y) / 10
x = 25.5 - 2.5y
Put x = 25.5 - 2.5y in (2)
25(25.5 - 2.5y) + 10y = 270
637.5 - 62.5y + 10y = 270
-52.5y = - 367.5
y = 367.5 / 52.5
y = 7
x = 25.5 - 2.5(7)
x = 25.5 - 17.5
x = 8
Help please due in 45 minutes
Answer: B
Step-by-step explanation:
Markale sold his house for 175,000. If there is a 7% sales tax, how much money did he pay taxes
Answer:
12250
Step-by-step explanation:
Two window washers, Meg and Bert, lean a ladder against the side of a building so that Meg can wash a window while Bert holds the ladder. The top of the ladder reaches the window, which is 8 meters off the ground. The base of the ladder is 6 meters away from the building. How long is the ladder?
Step-by-step explanation:
we can solve this question using Pythagorean theorem the hypotenuse of the ladder is 8 metres and base of the ladder is 6 metres so height will be..........
Hypotenuse²=Base²+ Height²
8²=6²+H²
64-36=H²
28=H²
7√2=H² Answer
Answer:
10
Step-by-step explanation:
A flagpole that is 21 ft tall casts a shadow that is 30 ft long. What is the angle of elevation of the sun when this shadow is cast?
Answer:
34.99°
Step-by-step explanation:
CHECK THE ATTACHMENT FOR THE FIQURE
Let angle( X) = angle if elevation
From trigonometry, tan(X)= opposite/ adjacent
Height of the flagpole= 21 ft , which is the opposite side
The base, adjacent side = 30 ft
If we substitute the values we have
Tan(X) = 21/30
Tan(X)= 0.7
Tan-1(0.7)=34.99°
Hence, the angle of elevation of the sun when this shadow will cast is 34.99°
Please help, I will give brainliest to whoever helps!
Answer:
Step-by-step explanation:
54.[tex]r=\sqrt{\frac{V}{πh} } =\sqrt{\frac{1256}{π100} } =2[/tex]\
55. H
56. A
What is the solution to
this system of linear
equations?
5v + 15rv – 5v + vr
please help
Will mark brainliest if done within 20 minutes of this being posted! NO LINKS NO FILES. Solve the radical equations and show your work, check your solutions too.
Step-by-step explanation:
5√x+3 = -20
÷5. : √x+3 = -4
square: x+3 = 16
-3: x = 13
√x+18 -2 = x -4
+2 : √x+18 = x -2
square: x+18 = x^2 - 4x +4
-18: x = x^2 -4x -14
-x : 0 = x^2 -5x - 14
foil: (x- 7) (x+2) = 0
x = 7, -2
6.7
x 2.5
2 x 6 =
2 x 0.7 =
1
11
0.5 x 6 =
0.5 x 0.7 =
Answer:
6.7
x 2.5
2 x 6 =53
Step-by-step explanation:
Answer:
1. 16.75
2. 12
3. 1.4
4. 1
5. 11
6. 3
7. 0.35
Help is needed, thank you so much!
Answer:
t=36
Step-by-step explanation:
54-18 = 36
Answer:
t + 18 = 54
Step-by-step explanation:
t + 18 = 54
subtract 18 from both sides
t = 36
The temperature during the night was 36 degrees
Hope that helps
50 POINTS!!! Nadeem is training for a bicycle race. On Monday, he bicycled for 30 minutes at 30 miles per hour. He rested for 10 minutes and then bicycled for 20 minutes at 36 miles per hour. Complete the table below and or draw the distance-time graph. (I JUST NEED THE GRAPH PART GIVING BRAINLIEST FOR BEST GRAPH)!!!
Answer:
your two points would be 30 minutes and 15 miles then 60 minutes and 18 miles
Find the value of x. Round your answer to the nearest tenth.
x≈
Answer:
You did not give us an equation :\
In a team of 24 players, about 80% of the team was on the honor roll last quarter. How many students were on the honor roll?
Answer:
19
Step-by-step explanation:
24 * 80% = 24*0.8 = 24* 8/10 = 24*4/5 = 96/5 = 19.2
round down becuase 0.2, or 20% of a person can not earn honor roll without suffering catastrophic organ failure.
Which graph represents the function f(x) = 4|x|?
Which graph represents the function f(x) = 4|x|?
It looks like a "V" going straight up from 0, and hits both 4 and -4 y while going up perfectly
The graph opens upward, and it has a vertex of (0,0)
What is vertex?The vertex of an equation is the minimum or the maximum point on the graph of the equation
The equation of the graph is given as:
[tex]f(x) = 4|x|[/tex]
The above equation represents an absolute value function
An absolute value function is represented as:
[tex]f(x) = a|x -h| + k[/tex]
So, by comparison, we have:
[tex]a = 4[/tex]
[tex]h = 0[/tex]
[tex]k = 0[/tex]
This means that the graph opens upward, and it has a vertex of (0,0)
See attachment for the graph of [tex]f(x) = 4|x|[/tex]
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A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?
Answer:
the answer is 66feet
Step-by-step explanation:
can i get a brainliest plz
what number multiples to 24 and adds to 10?
Answer:
4 and 6?
im not sure if you meant numbers
Step-by-step explanation:
A rectangular prism has a volume of 97.5 cubic inches. The length is 5 inches and the height is 3 inches. What is the width of the rectangular prism?
Answer:
6.5
Step-by-step explanation:
3X5=15
97.5/ 15 = 6.5
Which of the following expression represents the area of the circle?
O 2π(x+2)
O π(x+2)^2
O π(2x+4)^2
O 2π(2x+4)
Answer:
π(x+2)^2
Step-by-step explanation:
The formula for the area of a circle is π*radius squared.
2x + 4 is the length across the entire circle, which would make it the diameter.
The radius is half the diameter.
So, to find out the radius, simply divide the diameter by 2.
2x+4/2
x+2
Now, plug the newly found radius into the formula.
Area=π*(x+2)^2
find the missing side 3 and 4.
Answer:
3. [tex]5\sqrt{3} \\[/tex] m
4. 5 m
Step-by-step explanation:
Just use Pythagorean theorem
I need help with this ASAP. Can you tell me what goes in what box.
Answer:
answers
Step-by-step explanation:
2 and 3rd
The average weight for three children was 79.6 pounds. What was the sum of their
weight?
Answer: 238.8
Step-by-step explanation:
To get an average, you add the weights together, the sum. And then you divide by how many children there was.
To go backwards, you'd times the average by the amount of children there were, 3, to get the sum
79.6 times 3 is 238.8
Use the long division method to find the result when 4x^3+23x^2 + 21x + 30 is
divided by x +5.
Answer:
A polynomial is an algebraic expression made up of two or more terms subtracted, added, or multiplied. A polynomial can contain coefficients, variables, exponents, constants, and operators such as addition and subtraction.
It is also important to note that, a polynomial can’t have fractional or negative exponents. Examples of polynomials are; 3y2 + 2x + 5, x3 + 2 x 2 − 9 x – 4, 10 x 3 + 5 x + y, 4x2 – 5x + 7) etc. Like number, polynomials can undergo addition, subtraction, multiplication, and division.
We saw addition, subtraction, multiplication, and long division of polynomials previously.
hope it helps make brainlliest ty
if jeff has 20 apples and mike has 18 apples how many aplles do they both have combined.
How many grams are 7.00 x 1022 molecules of NaOH?
Answer:
46.5
explanation
6.022*10^23 molecules=40g.
7.00*10^23=40*7.00*10^23/6.022*10^23 g =46.5 g
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.65g are 7.00 x 10²² molecules of NaOH.
What is mole?The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of NaOH= 7.00 x 10²² atoms
Substituting the values
mole=7.00 x 10²²÷ 6.022×10²³
mole =0.116 moles of NaOH
mass of NaOH= Molar mass of NaOH× moles of NaOH
= 40 × 0.116
= 4.65g
Therefore, 4.65g are 7.00 x 10²² molecules of NaOH.
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need help with this !
Answer:
(-2,14) Hope this helps! Have a great day!!!
PLEASE HELP FAST AND PLEASE DON'T POST A LINK
Your parents are planning to rent you an apartment when you go to college. The annual contract is $535.00/month with a 2-month penalty for breaking the lease. The month-to-month contract is $615.00/month. What is the difference in the amount paid if you leave after 8 months?
Answer:
The difference in amount = $430
Step-by-step explanation:
1- Annual contract:
The annual contract means a contract for 12 months. There is a month penalty for breaking the lease.
This means that, if you left after 8 months, you will have to pay for 10 month.
Total paid = monthly payment * 10
Total paid = 535 * 10 = $5350
2- Month-to-month contract:
You will only paid for the 8 months you stayed,
Total paid = monthly payment * 8
Total paid = 615 * 8 = $4920
3- Getting the difference:
We can note that a month-month contract is a better option if you intend to stay for only 8 months
Difference = 5350 - 4920 = $430
Hope this helps :)
Noah uses 1/2 of a cup of vinegar in his salad dressing recipe. How much vinegar would Noah use to make 3 1/6 recipes? Write your answer as a fraction or as a whole or mixed number.
(Please help me)
Answer:
1 7/12 cups
Step-by-step explanation:
1/2 x 3 1/6 = 1/2 x 19/6 = 19/12 or 1 7/12
For 1 he uses half cup
For 3 1/6 of the same recipe
He would use:-1/2*3 1/6
19/12 cup of vinegar
=1 7/12(Answer)
I'll mark you brainliest if your correct
Answer:
The answer is 7
Step-by-step explanation:
on the graph number 6 is spun at 7
ѕєє thє híght σf вαr αt 6!! whαt'ѕ thє hєíght? σвvíσuѕlч ít'ѕ 7
í hσpє чσu gєt ít :)
Why is homework inportant?
Step-by-step explanation:
homework is like extra practice about what u had previously learned about that day