16 Ashley was given $4000 when she turned 2 years old. Her parents
invested it at a 3% interest rate compounded annually. No deposits or
withdrawals were made. Which expression can be used to determine
how much money Ashley had in the account when she turned 18?
(1) 4000(1 -.03)
(2) 4000(1 +.03)
(3) 4000(1 +.03)
(4) 4000(1 -.03)
16
18
18

Me what is the value of x? showing work would be appreciated - ! : )

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297