An upright cylindrical tank 10 feet tall with a radius of 4 feet pumps a mystery liquid out of a spout 6 feet above the top of the tank. The tank is half full. It takes 540 foot-pounds to pump all the liquid out of the tank. How
many pounds does the liquid weigh per cubic foot?

Jessa bought a yoyo from a company that claims that, with each retraction, the string rolls up by 60% of the original length. she sets up a tape measure and throws the yoyo 3 times. her data are charted below. throw length of string (feet) 1 3 2 1.8 3 1.08 jessa wants to find the sum of the length of string after 10 throws. what is the sum of the lengths, rounded to the nearest hundredth?