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?
–3 hours 15 minutes, because all the preparation times add to 3 hours and 15 minutes
–3 hours 35 minutes, because all the preparation times add to 3 hours and 35 minutes
–2 hours 35 minutes, because all the preparation times add to 2 hours and 35 minutes
–2 hours 15 minutes, because all the preparation times add to 2 hours and 15 minutes

Answer 1

Well 1st off do you think that they should start right at the amount of time it equals or earlier because of problems you could run into?

Answer 2

yea

Answer 3

ok so i added it alll up but i got 275

Answer 4

2 25

Answer 5

so then you'd have to turn that into hours

Answer 6

ik

Answer 7

so then it would be 3 15

Answer 8

correct, that's would I would think

Answer 9

but then what would the answer be on there!

Answer 10

i mean 3 25

Answer 11

np nvm its 15

Answer 12

thx

Answer 13

Yes, so do you know what the answer would be?

Answer 14

3 15

Answer 15

Yes that's what I believe