Suppose that a sledgehammer that weighs 18 pounds on Earth will weigh about 4 pounds on the planet Namar. Based on this, your weight on Namar would be about ___ times your weight on Earth.
A. 0.25
B. 4
C. 0.5
D. Not enough information.

Question

Suppose that a sledgehammer that weighs 18 pounds on Earth will weigh about 4 pounds on the planet Namar. Based on this, your weight on Namar would be about ___ times your weight on Earth.
 A. 0.25
 B. 4
 C. 0.5
 D. Not enough information.

johnweldon1993 · Answer

Well you know that clearly it is less than the weight on Earth...so it can't be more than 1....so 4 is automatically out of the question

To find what the weight would be...you would do

$$\frac{ 4 }{ 18 } = ?$$

anonymous · Answer

0.25?

johnweldon1993 · Answer

Right..that is the closest to the true answer...so yes it would be correct

anonymous · Answer

Will you help me with the next one?

anonymous · Answer

A sledgehammer weighs 18 pounds on Earth and 4 pounds on the planet Namar. 
Based on the numbers, an 80–pound earthling would weigh about _____ pounds on Namar.



4

320

18

40

johnweldon1993 · Answer

For this one we can use a proportion...

$$\frac{ 18 }{ 4 } = \frac{ 80 }{ x }$$

We would cross multiply and solve for x

anonymous · Answer

so 18?

anonymous · Answer

Just one more sorry if im being a bother. i just need to pass this class. 
An astronaut weighs 170 pounds on Earth and 400 pounds on Jupiter. The astronaut captures an alien that weighs 120 pounds on Jupiter. What is the alien's weight on Earth?



34 pounds

51 pounds

78 pounds

283 pounds

johnweldon1993 · Answer

Yes 18 good.. and no problem dont worry about it....and okay again this can be a proportion

$$\frac{ 170 }{ 400 } = \frac{ x }{ 120 }$$

Cross multiply and solve for x again

anonymous · Answer

51?

johnweldon1993 · Answer

Correct again!

anonymous · Answer

okay so i think i have the answer for this one but to sdouble check
An astronaut weighs 170 pounds on Earth but only 68 pounds on Mars. While visiting the planet, the astronaut removes a rock sample that weighs 25 pounds on Mars. What is the weight of the rock sample on Earth?


1.5 pounds

6.25 pounds

10 pounds

62.5 pounds

anonymous · Answer

i got 10 pounds. but i feel like it would be wrong.

johnweldon1993 · Answer

Yeah that is wrong...show me what you did for it...

anonymous · Answer

i used proportion. $$\frac{ 170 }{ 60 }=\frac{x  }{ 25 }$$

anonymous · Answer

i set the proportion up wrong didnt i?

johnweldon1993 · Answer

No you set it up correctly...but used the wrong number

$$\frac{ 170 }{ 68 } = \frac{ x }{ 25 }$$

cross multiply and solve for 'x'

anonymous · Answer

62.5?

johnweldon1993 · Answer

Right there you go

anonymous · Answer

thank you so much!!

johnweldon1993 · Answer

No problem! Good work!