Can some one me solve this question
3.5x-20=2.4x+13

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3