## anonymous one year ago .

1. anonymous

|dw:1438262460718:dw|

2. anonymous

First, the formula of a rectangular prism : $$\sf \text{ SA = 2(wl +hl + hw)}$$ If you're increasing it by a scale factor of 2, just expand each side by 2 and reapply the formula :)

3. OregonDuck

Need help?

4. anonymous

yeah

5. OregonDuck

k one sec

6. OregonDuck

do you know what the width lengh or hieght is?

7. anonymous

no

8. OregonDuck

ok then let me figure this out

9. OregonDuck

The surface area of the similar prism is 2300

10. anonymous

what about the scale factor thing?

11. anonymous

and how did you do it

12. OregonDuck

the answer is 2300 those words are trying to trick you by being in the same sentence

13. OregonDuck

i got it because if it is larger by a scale factor of 2. then all you have to do if double the total for the orginal prism

14. anonymous

wow. okay

15. OregonDuck

yup :)