Find tan θ if sin θ = 3/4 and θ terminates in qi

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.