Hello!
Answer:
a) 9 in^2
b) 49 units^2
c) 10000 cm^2
d) 1600 in^2
Step-by-step explanation:
a) A=a^2=3^2=9
b) A=a^2=7^2=49
c) A=a^2=100^2=10000
d) A=a^2=40^2=1600
I do not know for e sorry.
Hope this helps!
