Acute angles angles that measure 60°

Horace's speedometer reads 60 miles per hour, but during a road test he finds that he was actually driving 58 mph. what is the percent error in horaces speedometer?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.