Pls help me i’ll do anything and hurry time limit. f(x) = 9 - x. evaluate f(-1)

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

If a || b and e || f , what if the value of y ?