There is a bag with only milk and dark chocolates the probability of randomly choosing a dark chocolate is 7/12 there are 35 dark chocolates in the bag and each is equally likely to be chosen work out how many milk chocolates there must be . Very confused

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

This is different from the first one can someone me

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?