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HACTEHA [7]
2 years ago
8

The radius of a circle is 8 kilometers.what is the area in terms of pi?

Mathematics
1 answer:
umka21 [38]2 years ago
4 0

Answer:

201.06

Step-by-step explanation:

A=πr^2

A=3.14*8^2

201.06

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If f(x) = 3x to the 2nd+ 1 and g(x) = 1-x, what is the value of (f-g)(2)?
melisa1 [442]

 

\displaystyle\\f(x)=3x^2+1\\g(x)=1-x\\\\(f-g)(x)=f(x)-g(x)=3x^2+1-(1-x)=3x^2+1-1+x=\boxed{3x^2+x}\\\\(f-g)(2)=f(2)-g(2)=3\cdot2^2+2=3\cdot4+2=12+2=\boxed{14}




3 0
3 years ago
You have 18 pictures to paste to a poster. You want to arrange them on the poster in rows so that there are an equal number of p
Lesechka [4]

Answer:

no idea too hard but try  math          way

Step-by-step explanation:

7 0
2 years ago
True or false: the lateral surface of cone a is exactly 1/2 the lateral surface area of cylinder b
Mazyrski [523]

Answer:

True

Step-by-step explanation:

We have that,

The cone A has the length of the lateral side = h and the height of the cylinder  B = h.

Since, the lateral surface areas are given by,

Lateral surface area of cone = \pi r\times l, where l is the length of the lateral side.

So, we get L_{A} = \pi r\times h.

Also, Lateral surface area of cylinder is 2\pi r\times h, where h is the height of the cylinder.

So, we get L_{B} = 2\pi r\times h

Thus, we see that, L_{A}=\frac{1}{2}\times L_{B}

Hence, the given statement is correct.

6 0
3 years ago
Let X be a normal random variable with mean 40 and standard deviation 2. Find P(X < 28).
Vikki [24]

Answer:

0

Step-by-step explanation:

Given :

Mean = 40 ; Standard deviation = 2

P(x < 28)

Obtain the Zscore :

Z = (x - mean) / standard deviation

P(Z < (28 - 40) / 2))

Z = (28 - 40) / 2

Z = - 12 / 2

Z = - 6

P(Z < - 6) = 0.000000

5 0
3 years ago
Use the figure to find the angle measures.
kicyunya [14]

Answer:

a. 50 degree

b.40 degree

c.140 degree

5 0
3 years ago
Read 2 more answers
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