Which of the following is a like radical to ^3sqrt7x?

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.