Need help on C and D thank you

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12