Help i will give brainliest

D. 27x3y3z-6

Step-by-step explanation:

You have to multiply the whole thing to the power of 3.

D = diameter

A = area

Pi = 3.14

R = radius

First, we have to find the area of the garden.

To find A we have to divide D by 2, which will result in the radius.

17.5 / 2 = 8.75

Then we multiply R to the second power by multiplying it by itself.

8.75 x 8.75 =  76.5625

Then multiply 76.5625 by Pi.

76.5625 x 3.14 = 240.40625

The divide 240.40625 by 30.

240.40625 x 30 = 8.014

Lisa will need about 8.014 teaspoons of fertilizer to cover her garden.

I hope this helps! :)