1/40 = .025, just multiply this by 21 and you have your answer
.525
The answer would be 2 to the 2nd power
Answer:
Step-by-step explanation:
Answer:
202.5cm^2
Step-by-step explanation:
P=2l+2w
63=2(9)+2w
63=18+2w
63-18=2w
45=2w
divide both sides by 2
22.5=w
check:
P=2(9)+2(22.5)
=18+45
=63
Area=l×w
=22.5×9
=202.5cm²
