PLZ HELP ME, will give brainliest

What is the volume of this square pyramid?

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

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?