I believe it's 20! Good luck!
Total time = upstream time + downstream time
he rowed the same distance both ways.
upstream time = D/4
downstream time = D/6
total time = D/4 + D/6 = 3D/12 + 2D/12 = 5D/12 = 3 hours
D = 3*12/5 = 36/5 or 7.2 miles
where D is the one-way distance. The total distance he rowed is 2*D = 72/5 or 14.4 miles
The total number of resumes Emily prints = 300
She pays $24.50 for the first hundred resumes. Therefore, number of resumes that remain = 300-100= 200 resumes
\Now she pays a flat rate for each additional 100 resumes.
She pay a total of 48.50 for total of 300 resumes. Since she pays 24.50 for the first 100, the amount the remains = 48.50 =24.50 = $24
Therefore, she pays 24 for 2 sets of 100 resumes
Therefore the flat rate after the first 100 resumes = 24/2 = $12
I am pretty sure it is b sorry if wrong