Subtract 28 from 49 which is 21 picked in the second hour
I am not sure about the last two phrases, but here's what I think.
2(n+18)
18(2+n)
8/9x + 3
• Make 1/3 into 8/9 by multiplying it by 3/3
• add -1 and 4 to get 3
The volume of a cylinder can be found be using the formula
A = pi * r^2 * h
In your cylinder, the height is 10 and the radius is 4, so substitute those values in the equation:
A = pi * 16 * 10
The area is 160*pi.