Help! I need this finished soon! I will give points and it’s just algebra!

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

Given tan∅=4/3 and π< ∅< (3π)/2; find cos2∅ a. -24/25 b. 24/25 c. -24/7 d. -7/25

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?