Answer:
1. 100
2. 27 
3. 30
Step-by-step explanation:
Area = 

=
x 
= 100
Volume = l x w x h
= 3 x 3 x 3
= 27
Answer:
Interest rate is 5.25% a year.
Step-by-step explanation:
r = (1/54)((22252.5/18000) - 1) = 0.004375
r = 0.004375
Convert decimal to percentage
R = 0.004375 * 100 = 0.4375%/month
Calculate annual rate
0.4375%/month × 12 months/year = 5.25% per year.
It is multiplied by to because the raidouis is double.