## Rachel411 3 years ago For a math project,Jane creates a cake shaped like a square pyramid with sides that measure 6 inches. The slant height is 7 inches. Jane wants to ice the cake with icing that cost \$0.20 per square inch. How much will it cost Jane to ice the cake? a. \$8.40 b. \$16.80 c. \$10.80 d. \$21.60 Explain. Thanks.

1. Rachel411

@timo86m

2. timo86m

|dw:1352769793102:dw| ?

3. Rachel411

I think.

4. timo86m
5. Rachel411

Do you understand it?

6. timo86m

cost is 2 * b* s * .2

7. Rachel411

Will you explain?

8. timo86m

|dw:1352770021276:dw|

9. Rachel411

Yes, that is correct....from what I see on the question.

10. Rachel411

What did you get as the answer?

11. timo86m

just use the formula from this link http://math.about.com/od/formulas/ss/surfaceareavol_5.htm dont include the b^2 part since you dont ice the floor of the cake So it is 2 *7*6*.2

12. timo86m

16.8

13. Rachel411

hmm...ok.

14. Rachel411

Thank u:)

15. Rachel411

Did you get my other messages?

16. Rachel411

Tnx for ur help. @timo86m

17. Rachel411

tnx for the medal:)

18. Rachel411

What?

19. Rachel411

Listen, grg,but Ill message u tmrw... Im probably gonna have a lot more math to do...ok?

20. Rachel411

tnq uuu:)