List the first 4 terms of a geometric sequence with a first term of 2 and a common ratio of 5? I'm really struggling... there is one similar for the next question too. It's the same, but the first term is 4 and the common ratio is 4. Thanks for the help

This is so hard and it’s for a test

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?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?