Andy estimated that he would need 71 feet of lumber for a tree house project. he later found that the actual amount of lumber needed was 60 feet. what was the percent error of andy's estimation?
18.33%
15.49%
11%
84.51%

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?