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Anuta_ua [19.1K]
3 years ago
15

a sphere has a great circle with a circumference of 20pi inches. what is the surface area of the sphere?

Mathematics
1 answer:
maxonik [38]3 years ago
7 0

Answer:

A≈1256.64

Step-by-step explanation:

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Can someone help me please
zavuch27 [327]

Answer:

C

\:  \\ diameter  = 4ft  \\ \: raduis \:  =  \frac{diameter}{2}  \\ raduis  =  \frac{4ft}{2} = 2ft \\ c = 2\pi \: r \\ c = 2\pi2ft \\ c = 4\pi \: ft \\ c = 4 \times 3.14 = 12.56ft

8 0
2 years ago
ABCD diagonals intersect at E. If m∠BAC=4x+5 and m∠CAD=5x-14, then find m∠CAD.
Travka [436]

Answer: m∠CAD = 81°

Step-by-step explanation: <u>Diagonal</u> is a line that unites opposite sides.

ABCD is a prallelogram. One property of diagonal in a parallelogram is it separates the parallelogram in 2 congruent triangles.

The figure below shows ABCD with its diagonals.

Since diagonal divides a parallelogram in 2 congruent triangles, it means the internal angles are also congruent. So

m∠BAC = m∠CAD

4x + 5 = 5x - 14

x = 19

Then, m∠CAD is

m∠CAD = 5(19) - 14

m∠CAD = 81

The angle m∠CAD is 81°.

7 0
2 years ago
URGET PLEASE HELP QUICKLY
alexdok [17]

Answer: -0.5.

Step-by-step explanation:

The constant of variation k for the direct variation is given by:-

k= \dfrac{f(x_2)}{x_2}=\dfrac{f(x_1)}{x_1}

The given table:

x  f( x )

0   0

2   -1

4    -2

7   -3.5

Then,

k=\dfrac{-1}{2}=\dfrac{-2}{4}=\dfrac{7}{-3.5}=-0.5

Hence, the constant of variation k for the direct variation is -0.5.

4 0
3 years ago
What decimal number is represented by the shaded part
Anna11 [10]

Answer:

The decimal that represents the shaded portion of the figure is 0.75.

Step-by-step explanation:

4 0
2 years ago
noah saved $47 in june, $36 in july, and $27 in august. Then noah spent $18 on school supplies and $36 on new clothes. How much
Rashid [163]
$56
47 + 36 + 27 = 110
110 - 18 - 36 = 56
4 0
2 years ago
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