This problem was solved incorrectly. circle the mistake in the work/answer, explain what the mistake is, and find the correct answer. use 3.14 for pi and round to the nearest hundredth if necessary

The mistake was that when substituting in the value for d, the student used the value for the radius instead.

For this to be correct, they should double the value of the radius (so do 5.1 × 2) to give them 10.2, and then work out the question:

C = π × d

C = 3.14 × 10.2

C = 32.028 ≈ 32.03 m (rounded to the nearest hundredth)

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.