Find the area of the semicircle. Round your answer to the nearest whole number, if necessary. the number is 40cm

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Find parametric equations for the line. (enter your answers as a comma-separated list of equations. let x, y, and z be functions of t.) the line in the direction of the vector 5 i + 5 j − 6k and through the point (−4, 4, −2).

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.