zoey invested $230 in a account interest rate was 6.3% daily to the nearest hundred dollars, would be after 12 years

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?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Is there an x intercept in the equation 60*1.15^x