Answer:
use mathaway or algebra calculator they help alot
The first one because it’s the actual formula for a sphere and it has pie at the end because we are solving for a sphere
You are correct with the 1.42 but wrong with the 10^5
Count the digits after the 1, which is 7. So it should be
1.42 x 10^7
8+7=15
300/15=20
8 x 20 =160 Boys
7 x 20 = 140 girls
140 + 160 = 300
Hope this helps!
21.325 is the correct answer
