Find the variable (this is special right triangles unit) Ill thanks, 5 star and brainliest for the correct answer, plus there is 50 points in it for you

Which of the following are parts of a sphere

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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.