THIS ONE IS URGENT FOR A TEST PLEASE HELP! The diameter of a circle is 18 miles. What is the circle's circumference?​

I think it is 56.549 but it also could be around 28.6

Step-by-step explanation:

I am not the brightest person so sorry...

56.55 miles

Step-by-step explanation:

R = 18 / 2 = 9

C = 2pi * R = 56.55

Detailed explanation:

Circumference (C) can be calculated from the radius (R), and the radius is half of the diameter (18), so if we take the diameter, cut it in half, and plug it into the standardized equation we get the circumference, which is 56.55. Finally we toss on the unit type to the end of our answer, the diameter provided was 18 miles, so therefore out unit of measurement was miles.

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.

step-by-step explanation:

graph using a few selected

x         y

-1       15

0         6

1         2.4

2       0.96