Kristen is wrapping presents for the holidays. She has a box that measures 4 ft. x 2 ft. x 2 ft. How many square feet of wrapping paper does she need to cover the box without overlapping?
A) 16 ft2
B) 40 ft2
C) 64 ft2
D) 96 cm2
we can either just mutiply them and add them (area=legnth times width) or we can use Surface Area formula (which can be found for only rectangular prisms)
SA=2(LW+LH+WH)
L=4 W=2 H=2 sub SA=2(4*2+4*2+2*2) SA=2(8+8+4) SA=2(20) SA=40
