A bookcase measures 13 feet wide and 24 feet tall. What would the bookcases measurements be on a scale drawing using the scale 3cm : 2ft?

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Icould really use some with this question.