Ineed i don’t get these questions if anyone know can you tell me the answer need asap

Which expression is equivalent to 3^3 + 2^2?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Victor is a mechanic who wants to ensure he has enough funds during his old age. which account will be of benefit to victor? a. checking account b. savings account c. money market account d. individual retirement account