The ratio of the surface area to the volume will decrease
Fourth test mark should be 86
85 + 82 + 75 + 86 = 328
328 divide by 4 (as there are four tests) = 82
Answer:
9. 21
10. 70
11. 64
12. 31
13. 85
14. 31
double check the answer, i didnt use a calculator so might be wrong
The equation would be b = -a or a = -b
I hope this helps :)
