Chris can do 30 pushups in 60 seconds. At this rate
how many pushups can he do in 360 seconds?

180 pushups

Step-by-step explanation: First set up a proportion. The proportion would be 30 pushups over 60 seconds  equal x over 360 seconds. Then you would cross multiply which is 60 times x which is 60x .After that do 30 times 360 which is 10,800.Now you have 60x = 10,800.NOw divide both sides by 60 which gives you 180 as x.

Hope it helps and pic is down below if want to understand more :)

Brainliest  if helps you.

c. 4 and 1/2 pounds is the answer! : )