Donnell practiced 7 hours while Marcus practiced 4 hours.
Compose the quadratic condition in standard shape, ax2 + bx + c = 0. Recognize the values of a, b, c. Write the Quadratic Equation. At that point substitute within the values of a, b, c. Simplify. Check the arrangements.
Answer:
90
Step-by-step explanation:
90 degree angles are angles with a 90 degree turn
