Which formula will calculate out the area of the half circle? Select one:
a. 3.14 x 1.7 x 1.7 ÷ 2
b. 3.14 x 3.4 x 3.4 ÷ 2
c. 3.14 x 3.4 x 7.2
d. 3.14 x 3.4 x 3.4

Three children each had the same amount of money in their savings account. one of the children withdrew three quarters of her moneyand spent it all on a $100 sports jersey. what was the total amount of money originally in the accounts?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

How can you find the mean absolute deviation (mad) for this set of data?