There are 5 bacteria in a petri dish at the start of an experiment. this type of bacteria doubles every 20 minutes.

find the number of bacteria after 4 hours.

40

10,240

20,480

40,960

Find the radius of a circle that has a circumference of 16. the formula for the circumference of a circle is c = 2tr, where r is the radius and c is the circumference. the equation solved for r is r = c over 2π. r=4 r= 8 r=12 r= 16