What is the length of the hypotenuse for a right triangle with legs of length 9 and 40?

What is the missing constant term in the perfect square that starts with x^2 -20x

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

One hectometer is a) 1/1000 of a meter. b) 1/100 of a meter. c) 10 meters. d) 100 meters. e) 1000 meters.