At the age of 14, Lois was 5 foot 3 inches tall. After hitting a growth spurt, at the age of 16, Lois was 5 foot 11 inches tall. What is the percent of increase in Lois' height over that time?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.