-2(4+b+6)-6(3d-5
-8-2b-12-18d+30
10-2b-18d
Hope this helped!
-Twixm
11/4% = (11/4)/100 = 11/400 = 0.0275;
1/4 = 0.2500;
1/80 = 0.0125;
We observe that 0.0125 < 0.0275 and 0.0114 < 0.0275 and 0.2500 > 0.0275 and 0.12500 > 0.0275;
The answers are c. and d.
Your answer is 5, you use the formula for a pyramid