A science class was studying a population of mosquitoes. They found that the population doubled every day. Their study started with 20 mosquitoes. How many
mosquitoes will there be after 20 days?
A)1.048576E26
B)5120
C)2080
D)20,971,520

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?