The function f(x) = −x2 − 9x + 36 shows the relationship between the vertical distance of a diver from a pool's surface f(x), in feet, and the horizontal distance x, in feet, of a diver from the diving board. what is a zero of f(x), and what does it represent? x = 3; the diver jumps in the pool at 3 feet per second x = 3; the diver hits the water 3 feet away horizontally from the board x = 12; the diver hits the water 12 feet horizontally from the board x = 12; the diver jumps in the pool at 12 feet per second

Factor your polynomial to find the zero. When you factor that you get x values of -12 and 3. Because x is a horizontal value representing feet, x = 3 means that he hits the water 3 feet away horizontally from the board. He starts at 36 feet above the pool and has an upwards vertical velocity of 9 feet per second. Your answer, however, is the first choice above.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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