There are 9 students participating in a spelling bee. In how many ways can the students who go first, second, and third be chosen?
B.504 ways
C.529 ways
a. 454 ways
d. 404 ways

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter