If f(1) = 160 and f(n + 1) = –2f(n), what is f(4)?

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?

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6