Ineed to do this math but i don’t understand

Customary:  inch, foot, yard, mile

Metric:  centimeter, kilometer, meter

Measurement: area, formula, height, perimeter

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.