A cell biologist was growing bacteria in a dish. At hour 1, there were 200 bacteria in the dish, and at hour 2 there were 500 bacteria. What percent increase occurred between hour 1 and hour 2?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides.should be his answer

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42