a

The ratio of the weight of an object on Mars to the weight of that object on Earth is 0.4 to 1

a.) How much would a 12-ton rocket weigh on Mars?

b.) How much would a 120-lb astronaut weigh on Mars?

a.) How much would a 12-ton rocket weigh on Mars?

b.) How much would a 120-lb astronaut weigh on Mars?

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The ratio of the weight on Mars to the weight on earth is {{{0.4/1 = 40}}}%.
So you would just multiply the object's earth-weight by 40% (or 0.4) to get the object's Mars-weight.
a) For the 12-ton rocket:
{{{12(0.4) = 4.8}}}tons.
b) For the astronaut:
{{{120(0.4) = 48}}}lbs.

A) .4/x:1/12
cross multiply
x=.4*12
x=4.8 tons
----------------
B) .4/x:1/120
x=.4*120
x=48 lbs

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