Answer:
D.2
Step-by-step explanation:
The z-score of an appliance that stopped working at 64 months is 2
What is z score?Standard score or z score in statistics is defined as the number of standard deviations by which that the value of a score is above or below the mean value.
The formula to find the z score of a data is,
z = (x - μ) / σ
Here x is the observed value, μ is the mean and σ is the standard deviation.
Given that,
Mean = 48 months
Standard deviation = 8 months
x = 64 months
Substituting in the formula,
z = (64 - 48) / 8 = 2
Hence the z score of the appliance is 2.
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A math club took a math test. Twelve of the members had an average score of 80 points. Eighteen of the members had an average score of 86 points.
What was the class average?
Answer:
The class average is 83.6
Step-by-step explanation:
:D
Answer:
WHEN THE SUNN DONT SHINE U SHINE SUM OREEEE IM ALMOST THEREE!1!!! ALMOST THEREEE AWNSER 83.7
Step-by-step explanation:
two sides of a triangle measure 24 inches and 29 inches. which of the following lenght could represent the third side
(A) 8,8,17
(B) 2,11,12
(C) 20,6,15
(D) 19,34,15
Step-by-step explanation:
We know that the sum of two sides of a triangle is always greater than the third side . Here , the sum of sides is , 24 + 29 = 53 .
Calculate the distance between Points A and B.
A.4.5
B.7.1
C.7.8
D.9.2
Answer:
7.8 units separate the points A and B.
Step-by-step explanation:
Going from B to A, x increases by 6 (this is the horizontal side of the triangle formed by vertices A and B), and y increases by 5. Applying the Pythagorean Theorem, we get
d = √(6² + 5²), or √(61, which is approximately 7.8, the desired distance.
How much does 4 miles =
Answer:
6.44 km
21120 feet
7040 yard
253440 in
Step-by-step explanation:
Answer:
4 miles =21, 120 ft
4 miles =253,440 inches
4 miles = 7040 miles
Step-by-step explanation:
Hope this helped!!!!
If a chicken has 4kg of corn, how many days will it last if it eats 1/8 of a kg of corn a day?
Answer:
32 days
Step-by-step explanation:
4 ÷ ⅛ =
4 × 8 = 32 days
Answer:
32 days
Step-by-step explanation:
4kg÷⅛ of a kg
=4/1× 8/1.......... that is the reciprocal of ⅛
=32 days
You start at (2, -4). You move up 4 units. Where do you end?
Answer:
(2, 0)
Step-by-step explanation:
Hope This Helps! : )
The function f(x)=Acosh(Cx)+Bsinh(Cx). I need help determining the value of constant C>0 when the second derivative f''(x)=25(f(x)).
Answer:
C = 5.
Step-by-step explanation:
First, you need to remember that:
For the function:
h(x) = Sinh(k*x)
We have:
h'(x) = k*Cosh(k*x)
and for the Cosh function:
g(x) = Cosh(k*x)
g'(x) = k*Cosh(k*x).
Now let's go to our problem:
We have f(x) = A*cosh(C*x) + B*Sinh(C*x)
We want to find the value of C such that:
f''(x) = 25*f(x)
So let's derive f(x):
f'(x) = A*C*Sinh(C*x) + B*C*Cosh(C*x)
and again:
f''(x) = A*C*C*Cosh(C*x) + B*C*C*Sinh(C*x)
f''(x) = C^2*(A*cosh(C*x) + B*Sinh(C*x)) = C^2*f(x)
And we wanted to get:
f''(x) = 25*f(x) = C^2*f(x)
then:
25 = C^2
√25 = C
And because we know that C > 0, we take the positive solution of the square root, then:
C = 5
What is the solution to the following equation? (4 points)
2(3x − 7) + 18 = 22
a
1
b
3
c
5
d
6
Answer:
Zoom it
mark me as brainliest
The answer is 3
Open the brackets:2(3x - 7)=6x -14
6x - 14 +18 =22
Take all the numbers to the other side
6x =22+14-18
6x =18
Divide by 6 kn both sides
x=3
hey besties! can you help me? :)
Answer:
1. 20/3 or 6 2/3
2. 0.4
3. 11
4. 11
5. They are both similar
Hope this helps!
Find the common difference of the arithmetic sequence 13, 9, 5,
Answer:
4
Step-by-step explanation:
Mark me as brainlist ez
Answer:
-4
Step-by-step explanation:
13, 9, 5, 1, -3, -7, .......
Interpreting an Expression
Jerome wrote the following scenario to match the algebraic expression s
4
− 16:
“16 fewer than four times the number of songs on my mp3 player”
Does his scenario match the expression? Explain.
The scenario does not match the expression, the expression is 4 - 16 so it would be 16 fewer than 4 songs
Help I need this tomorrow
9. Make Sense and Persevere The graph shows
the number of gallons of water in a large tank
as it is being filled. Based on the trend line,
predict how long it will take to fill the tank
with 375 gallons of water.
Answer:
About 18 minutes
Step-by-step explanation:
Find the mean of the data in the dot plot below. students Size of each of Mr. Sirac's classes + + + + 21 20 22 23 24 25 26 28 27 Number of students Show Calculator Report a Stuck? Watch a video or use a hint.
There are 70 dogs and 55 cats at the shelter. FIFTEEN of these animals get adopted. What % of the animals got adopted?
Answer:
Step-by-step explanation:
27
What is the value of CA?
15
9
18
30
15
ILL BRAINLIEST YOU IF YOU GET IT RIGHT
Answer:
I think the answer is B. If not its probably c. The answer is between those two.
Step-by-step explanation:
Hope this helped
Grogg says that if you square a number then square eoot it, he will always end up with the same number he started with. Is this correct? Why or Why not?
Answer:
Yes
Step-by-step explanation:
Given a number, a
Square of number = a²
Square root of number = √a² = a
Assume a = 4
The square of 4 = 4² = 16
The square root of 16 = √16 = 4
Hence, Grogg is correct
In a race a cyclist travels 3/8 of the distance in the first hour and 1/3 of the distance in the second hour. What fraction of the total distance has he travelled? What fraction of the total distance does he need to travel in the third hour to complete the race.
Answer:
7/24
Step-by-step explanation:
Answer:
Distance traveled:
3/8 + 1/3 = 9/24 + 8/24 =17/24Remaining distance:
1 - 17/24 = 24/24 - 17/24 =7/24Kiley was solving the equation: y= x ÷ 2 + 1 . Her first three y numbers were 3, 5, and 7. Her friend Gia said the ordered pair for the next number would be (16,9). Kiley disagrees. Why is Kiley correct?
What is the average rate of change between Hour 1 and Hour 4? QUICKLY
Answer:
2%
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
In the diagram shown,
P
T
=
Q
T
=
Q
R
.
Also,
R
T
=
R
S
and
∠
P
T
Q
=
36
∘
.
What is
∠
P
T
S
?
Answer:99
Step-by-step explanation:
Find the area of the triangle.
A. 90m2
B. 67.5m2
C.45m2
D.33m2
Answer:
Step-by-step explanation:
Answer:
45 m²
Step-by-step explanation:
6 x 15 x 0.5 = 45
pls help help help help help help help
Answer:
Y= -1/3x+5
Step-by-step explanation:
the first box is the slope and the second box is the y intercept
75in, 60 in Pythagorean
What’s the missing leg?
Answer:
X = 45
Step-by-step explanation:
a^2 + b^2 = c^2
60^2 + a^2 = 75^2
3,600 + a^2 = 5,625
- 3,600 - 3,600
____________________
a^2= 2025
square root them
a^2 = a
2025 = 45
so x =45
Yanyiah has m dollars. If Erica has 2 times as many dollars as Yanyiah minus 3 dollars, write an expression for how much money Erica has.
Answer: Erica has 2m-3 dollars
Step-by-step explanation:
Amount of dollars Yanyiah has = m dollars =$m
Erica has 2 times as many dollars as Yanyiah minus 3 dollars, can be expressed as =(2m-3)dollars,
We can therefore say Erica has 2m-3 dollars.
CARL BUYS 4 ONT PINT CARTONS OF MILK. HE BUYS LESS JUICE THAN MILK. WHICH COULD BE THE AMOUNT OF JUICE.
Answer:
0 pints ≤ J ≤ 4 pints
Where J is the amount of juice that Carl bought.
Step-by-step explanation:
Here we need to learn how to use the inequality symbols.
Let's define each one of them:
A < B (A is strictly smaller than B)
A > B (A is strictly greater than B)
A ≤ B (A is smaller than or equal to B)
A ≥ B (A is greater than or equal to B)
A ≠ B (A is different than B)
Ok, in this case, we know that Carl buys 4 one-pint cartons of milk.
Then the total amount of mil that he buys is 4 times one pint, this is:
4*1 pint = 4 pints
He has 4 pints of milk.
And we know that he buys less juice than milk, then if J represents the amount of juice that he bought, we need to have:
J < 4 pints
This means that the amount of juice that he bought is smaller than the quantity of milk that he bought (4 pints)
If we want to be more correct, we should write:
0 pints ≤ J ≤ 4 pints
Here we say that J needs to be a positive number (we can't buy a negative quantity of juice)
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!
Answer:
Q. 3
[tex]V_{cone} =565.2\: cm^3 [/tex]
Q. 4
[tex] V_{cone} =3,014.4\: cm^3 [/tex]
Step-by-step explanation:
Q. 3
Radius of the cone (r) = 6 cm
Height of the cone (h) = 15 cm
[tex]\because V_{cone} =\frac{1}{3} \pi r^2 h[/tex]
[tex]\therefore V_{cone} =\frac{1}{3}\times 3.14 (6)^2 (15)[/tex]
[tex]\therefore V_{cone} =\frac{1}{3}\times 3.14 (36) (15)[/tex]
[tex]\therefore V_{cone} =565.2\: cm^3 [/tex]
Q. 4
Radius of the cone (r) = 12 cm
Height of the cone (h) = 20 cm
[tex]\because V_{cone} =\frac{1}{3}\pi r^2 h[/tex]
[tex]\therefore V_{cone} =\frac{1}{3}\times 3.14 (12)^2 (20)[/tex]
[tex]\therefore V_{cone} =\frac{1}{3}\times 3.14 (144) (20)[/tex]
[tex]\therefore V_{cone} =3,014.4\: cm^3 [/tex]
Carol has had a $145,000 fixed mortgage for 5 years at 5.5% and is
considering refinancing. She can now get an 80/20 mortgage with 4.5% and
9.5% interest, respectively. Based only on this information, should she
refinance?
Answer: no the two blended interest rates are the same
Step-by-step explanation:
Answer:
no, the new blended rate is higher than the old interest rate
Step-by-step explanation:
bc i said so
Find the area of the shaded region. Round your answer to the nearest hundredth.
Two concentric circles such that the inner circle divides the radius of outer circle into two segments of equal lengths labeled 8 centimeters. The region formed between two circles and one diameter of outer circle is shaded. The diameter makes an arc that measures 180 degrees.
The area is about ??? square centimeters. (if you have another answer you can add me on discord ^LoneLai^#0320)
Answer:
FIRSTLY GET THE AREA OF THE WHOLE CIRCLE BY USING FORMULA [tex]pi \times r ^2[/tex]THEN AFTER THAT DIVIDE THE AREA BY 2AFTER THAT UR ANSWER WILL COMEPLEASE MARK ME AS BRAINLIEST
Thus the area of shaded region is 301.5 cm^2.
What is circle?"The collection of all points equidistant from a fixed point in a plane is called a circle".
For the given situation,
The radius of the inner circle be r = 8 cm and
the radius of the outer circle be R = 16 cm
The formula to find area of the circle, [tex]A=\pi r^{2}[/tex]
Area of inner circle, [tex]A_{1} =\pi r^{2}[/tex]
⇒[tex]3.14[/tex] × [tex]8[/tex] × [tex]8[/tex]
⇒[tex]200.96[/tex]
≈[tex]201[/tex]
Area of outer circle, [tex]A_{2} =\pi R^{2}[/tex]
⇒[tex]3.14[/tex] × [tex]16[/tex] × [tex]16[/tex]
⇒[tex]803.84[/tex]
≈[tex]804[/tex]
The shaded region replicates the semicircle. So,
Area of the shaded region [tex]=\frac{A_{2} }{2} -\frac{A_{1} }{2}[/tex]
⇒[tex]\frac{804}{2} -\frac{201}{2}[/tex]
⇒[tex]402-100.5[/tex]
⇒[tex]301.5 cm^{2}[/tex]
Hence we can conclude that the area of shaded region is [tex]301.5 cm^{2}[/tex]
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When is a parallelogram also a rectangle?
Sometimes
Sometimes
Always
Always
Never
Never
Just on Fridays