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%

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?