Answer:
3/4 i believe
Step-by-step explanation:
The formula for the volume of a cylinder is pi x radius^2 x height, so after substituting the values, we get 3.14 x 3^2 x 4. First, we find the value of 3^2, which is 9. 3.14 x 9 equals 28.26, so now we have 28.26 x 4, which gives us 113.04. So the volume of the cylinder is 113.04. :)
2/3in=9mi
?in=21mi
we can set up a ratio and proportion, but I would fix that fractions because they tend to be messy
2/3in=9mi
multiply both sides by 3
2in=27mi
so now we have
2in:28mi=?in:21mi

multiply both sides by 21mi
the miles cancel and we get

1.5in=?in
1.5 inches represents 21 miles