Can someone please help me with this thank you

A = 216.314

C = 52.124

Step-by-step explanation:

We know the radius so now we need to know the diameter. So multiple the radius by 2.

R = 8.3

D = 16.6

Let's find the area first

A = 3.14×r²

A = 3.14×68.89

A = 216.314

Now find the circumference

A = 3.14×d

A = 3.14×16.6

A = 52.124

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.