The area of circle Z is 64 ft2.

What is the value of r?

r = 4 ft
r = 8 ft
r = 16 ft
r = 32 ft

r=4.51 ft

Step-by-step explanation:

Area of a circle is given by

where A is area and r is the radius. Making r the subject of the above formula then

Substituting A with 64 then

55

step-by-step explanation:

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.