Answer:
531 in^2
Step-by-step explanation:
21 x 18 = 378 in^2
17 x 9 = 153 in^2
378 + 153 = 531 in^2
0.003 is 1/10 of 0.03.
Just multiply the 0.003 by 10 and you'll get the answer.
This one is tricky....but I'll go for D cause your multiplying a number towards 5