Question

**Can somebody please check my work**

I have to build a deck thats 8ftx20ft using either 2x4x8 (which are actually 2x3.625x8) boards which are $2.98 each or 2x6x8 (which are actually 2x5.625x8) boards which are $5.98 each.

1. How many boards would you need for each option?
2. What is the cost for each option?
3. What is the best deal?

8*20=160ft^2*12=1,920in^2=deck area

#1 (2x4 option)
3.625*(8*12)=
3.625*96=348in^2=area of 2x4 board

1920/348≈6 (teacher said to round up on all answers)

#1 (2x6 option)
5.625*(8*12)=
5.625*96=540in^2=area of 2x6 board

1920/540≈4

Answer 1

#2 (2x4 option)
6*2.98=17.88

#2 (2x6 option)
4*5.98=23.92

#3 The 2x4 option is the better deal.