Question

The number (b) of bolts a machine can make varies directly as the time (t) it operates. it can make 6,000 bolts in 2 hours. how many can it make in 5 hours?

Answer 1

For this case we have a function of the form:
b = k * t
Where,
k: proportionality constant.
For this case:
k = 6000/2
k = 3000
Substituting values:
b = 3000 * t
For t = 5 we have:
b = 3000 * 5
b = 15000
Answer:
it can make in 15000 bolts in 5 hours