Answer:
10-52.85ft squared 11-144.84centimeters squared 12-304meters squared
Step-by-step explanation:
A-bh/2 10-7*15.1=105.7/2=52.85ft squared
A-bh 11-10.2*14.2=144.84cenitmeters squared
A-bh 20*15.2=304meters squared
12:21
4 + 7 = 11
33/11 = 3
3x4=12 & 3x7=21
Therefore, ratio is, 12:21
the answer is 16,500 days