Study the geometric sequence {-4, -84, -1764, -37044, ...}. What is the explicit formula for the sequence?
(21)(-4)(n-1)
O an = (-21)(4)(n-1)
O an = (-4) (21)(n-1)
O an = (4)(-21)(n-1)

Plzzz asapppppp what is the inverse of f if f(x)=^3 sqrt x-5

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years