If f(1)=10 and f(n)=-5f(n-1)-2 then find the value of 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?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out