An architect built a scale model of a shopping mall. On the model, a circular fountain is 45 inches tall and 58.5 inches in diameter. If the actual fountain is to be 10 feet tall, what is its diameter?

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

oof

step-by-step explanation: