The graph of which function is decreasing over the interval (4, )?
f(x) = (x + 4)2 + 4
f(x) = -(x + 4)2 + 4
f(x) = (x - 4)2 - 4
f(x) = -(x - 4)2 - 4

When y’all answer can y’all explain too !

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)