A.) First set up the equation:
L = 2(w)
w = w
B.) 2(w) * w = 20
=2w² = 20
=w² = 10, so w = 3.16 m²
The area is then 6.32 * 3.16, which is 19.97, but if you round both numbers, it becomes 20.16.
C.) 3.16 to the nearest tenth is 3.2.
D.) This is 6.32, which is 6.3 to the nearest tenth.
