Find the surface area of a sphere with a radius of 8cm. (use 3.14 for pi and round to the nearest tenth) a. 267.9 cm^2 b. 803.8 cm^2 c. 2143.6 cm^2 d. 201.0 cm^2

By definition, the surface area of a sphere is given by:

Where,

r: sphere radius

Substituting values in the given equation we have:

Doing the calculations we have:

Rounding to the nearest tenth:

The surface area of a sphere with a radius of 8cm is:

B. 803.8 cm ^ 2

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.