The sun is shining and a spherical snowball of volume 390 ft3 is melting at a rate of 19 cubic feet per hour. As it melts, it remains spherical. At what rate is the radius changing after 3 hours

0.221 ft/h.

Step-by-step explanation:

Below is an attachment containing the solution to the question.

f(x) = y

f(-3) = -5

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)