Which rate is equivalent to 72 kilometers per hour? (Hint: 1 mile = 1.61 kilometers) * 5 points
116 mph
54 mph
45 mph
12 mph

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours

Icould really use some with this question.

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 .is he correct? explain why or why not