jerenasmith8
21.07.2019 •
Mathematics
Someone ! ill give brainliest 1. a model rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = –0.04x2 + 8.3x + 4.3, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 208.02 m b. 416.30 m c. 0.52 m d. 208.19 m 2. a catapult launches a boulder with an upward velocity of 184 ft/s. the height of the boulder (h) in feet after t seconds is given by the function h= -16t^2 + 184t + 20. how long does it take the boulder to reach its maximum height? what is the boulder's maximum height. a. reaches a maximum height of 11.6 feet after 5.75 seconded. b. reaches a maximum height of 549 feet after 11.5 seconds. c. reaches a maximum height of 549 feet after 5.75 seconds. d. reaches a maximum height of 23.2 feet after 11.6 seconds. 3. a ball is thrown into the air with an upward velocity of 32 ft/s. its height (h) in feet after t seconds is given by the function h= -16t^2 + 32t + 6. how long does it take the ball to reach its maximum height? what is the ball’s maximum height? round to the nearest hundredth, if necessary. a. reaches a maximum height of 22 feet after 1.00 second. b. reaches a maximum height of 22 feet after 2.00 seconds. c. reaches a maximum height of 44 feet after 2.17 seconds. d. reaches a maximum height of 11 feet after 2.17 seconds.
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Ответ:
=>By y = –0.04x^2 + 8.3x + 4.3
=>0.04x^2 - 8.3x - 4.3 = 0
=>x = [-(-8.3) +/- √{(-8.3)^2 - 4 x 0.04 x (-4.3)}]/[2 x 0.04]
=>x = [8.3 +/- 8.34]/[0.08]
=>x = 208.02 m
Your answer is A. 208.02 m
2. A. Reaches a maximum height of 11.6 feet after 5.75 seconded.
3. B. Reaches a maximum height of 22 feet after 2.00 seconds.
Ответ:
LCM
Step-by-step explanation: