What is the diameter of this circle if the circumference is 30 pi inches?

30 inches

Step-by-step explanation:

Diameter is equal to two times the radius. The circumference formula is 2piR, and you can cancel the pi's. The answer would already be in diameter form.

1.true 2.false? ? i think. .

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.