Solve: 7+42*3^(2-3a)=14*3^-2a+7
A=-3
a=0
a=3
a=no solution

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Ammonia molecules have three hydrogen atoms and one nitrogen atom. how many of each atom arein five molecules of ammonia