Abank features a savings account that has an annual percentage rate of r=5.2% with interest compounded quarterly. marcus deposits $8,500 into the account.
the account balance can be modeled by the exponential formula s(t)=p(1+rn)^nt, where s is the future value, p is the present value, r is the annual percentage rate written as a decimal, n is the number of times each year that the interest is compounded, and t is the time in years.
(a) what values should be used for p, r, and n?
p= , r= , n=
(b) how much money will marcus have in the account in 7 years?
answer = $ .
round answer to the nearest penny.

Ineed asap. i cant understand this question i need someone to me right away

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi