Question

NASA uses a launch clock to measure time before and after lift-off. It takes 2 hours and 15 minutes of preparations on base, 20 minutes to travel to the launch pad, and 40 minutes of pre-launch checks once in the spacecraft. When should the astronauts begin preparation?
A –3 hours 15 minutes, because all the preparation times add to 3 hours and 15 minutes
B –3 hours 35 minutes, because all the preparation times add to 3 hours and 35 minutes

Answer 1

I'm just going too wait

Answer 2

We can remove options C and D from the list, so now from A and B, which one do you think it is?

Answer 3

ok ok i did it

Answer 4

Awesome! What did you come up with?

Answer 5

A?

Answer 6

Rightttt! Congrats :)

Answer 7

whoa