Hello!
a) Julie can read 0.8 pages.
The ratio of Julie's pages per minute is 60/75. As one minute, this equals 0.8 pages, or 4/5 pages.
b) p/m=4/5=350/m
To set up the proportion we will create variable labels to show where certain numbers will be in our proportion. our pages will be the numerators and minutes will be the denominators.
c) It will take her 437.5 minutes.
There are two ways to solve the proportion. You can find the multiplier between the numbers by dividing the second numerator by the first, and multiplying the quotient by the one denominator to find x.
You can also cross multiply, which sets up an equation to solve for x. This would give us 4x=1750. If we solve we get 437.5
I hope this helps!