Acertain alloy contains 14.25% nickel. how much nickel is there in a piece weighing 375 pounds? round to the nearest hundredth

Pls! does anybody know a shortcut for answering these types of questions in the future?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)