Posted by Anonymous on .
what is the speed in miles per hour of toy car that runs 40 ft in 8 seconds. 1 hour=3600. 1 mile=5280 ft

algebra 
Ms. Sue,
Cross multiply and solve for x.
40/8 = x/3600
8x = 144,000
x = 18,000 ft
18,000 / 5,280 = 3.4 mph