1. Find the surface area of a sphere with a radius of 8 cm. (1 point) O 267.9 cm2
O 803.8 cm2
O2143.6 cm2
O 201.0 cm?
2. Find the surface area of a sphere with a diameter of 12 m. (1 point)
O452.2 m2
O 150.7 m2
O 113.0 m2
0904.3 m2
3. Find the volume of a sphere with a radius of 4 ft (1 point)
O 33.5 A?
0 67.0 ft
O 267.9 ft
O 803.8 ft

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step-by-step explanation:

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west

answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10