Please help me :3 these are my questions and i need help. Any at all will be appreciated

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 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. what distance from city a is the point where the truck and the car will meet?