Percents
1.
martha estimated there were 95 marbles in a jar for a contest. the actual number of marbles in the jar was 117. what was the percent error of martha's estimation?
22%
81.20%
23.16%
18.80%

It is 18.80%. You use the percent error formula: %error= (true value-estimated value)/true value. So (117-95)/117 = .188034188. You multiply by 100 since you are finding the percent not the decimal and you get about 18.80%

A=bxh3.2x1.8=5.76 centimeters square