Question

At Trent's garage, 3 cases of brake fluid last 4 weeks. Trent has 5 cases. How much more brake fluid should Trent order so that he has enough for 13 weeks? Round your answer up to the nearest whole number.

Answer 1

Answer: Trent should order so that he has enough for 13 weeks==5

Step-by-step explanation:

Given: At Trent's garage, 3 cases of brake fluid last 4 weeks.

So, the number of cases per week = $\frac{3}{4}$

It implies the number of cases in 13 weeks= $13\times\frac{3}{4}=\frac{39}{4}=9.75\approx10$

Now, Trent has already 5 cases.

So, the number of cases, Trent should order so that he has enough for 13 weeks=10-5=5

Answer 2

3 cases / 4 weeks = 0.75 cases per week

for 13 weeks = (0.75 * 13) = 9.75 cases

9.75 - 5 = 4.75 rounded = 5...he needs to order 5 cases