You’re throwing a pizza party for 15 and figure each person will eat 4 slices. how much is the pizza going to cost you? you call up the pizza place and learn that each pizza will cost you $14.78 and will be cut into 12 slices.

the cost of pizza for 15 people is $73.9

Explanation:

a pizza party for 15 and each person will eat 4 slices.

meaning the 15 people will eat 4 x 15 = 60 slices

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.