What’s the volume of this???
(pls hurry i need to turn in soon)

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?