A family has two cars. During one particular week, the first car consumed 35 gallons of gas and the second consumed 30 gallons of gas. The two cars drive a combined total of 2450 miles. And the sum of their fuel efficiencies was 75 miles per gallon. What were the fuel efficiencies of each of the cars that week?

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?