Element X decays radioactively with a half life of 11 minutes. If there are 300 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 99 grams?

Ineed with number 17 i don’t get it at alll

In which form is the following function written? y = - 2(x – 3)(x + 5)

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays