Answer:
m + 18 + 23 = 71
m + 41 = 71
m = 71 - 41
<u>m = 30</u>
30
Step-by-step explanation:
m+18+23=71
m+41=71
m=71-41
m=30
A= 649.71
A=2(1+2)a2
=2·(1+2)·11.62
≈649.71315
c ...........................
