The depth of a river changes by negative seven over ten feet on friday, negative 7 over 8 feet on saturday, and negative 11 over 15 feet on sunday. On which day does does the river depth decrease the most?

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

i do not know the answer

step-by-step explanation:

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

idk

step-by-step explanation: