Question

a catapult launches a boulder with an upward velocity of 148 ft/s. the height of the boulder, h, in feet after t seconds is given by the function h=-16t^2+148t+30. what is the bolders maximum height? how long does it take the boulder to reach its mamimum height? round to nearest hundredth if necessary.
-reaches a maximum height of 30 feet after 9.25 seconds
-reaches a maximum height of 640.5 feet after 4.63 seconds.
-reaches a maximum height of 1,056.75 feet after 4.63 seconds.
-reaches a maximum height of 372.25 feet after 4.63 seconds.

Answer 1

@godofwar

Answer 2

use the formula x = -b / (2a)

Answer 3

i tryed

Answer 4

im doing something wrong

Answer 5

x = - (-148) / ( 2 * -16) =

Answer 6

-1,184

Answer 7

thats wrong, did you use order of operations?

Answer 8

oops 4.625

Answer 9

-(-148)= 148 then (2*-16)= -32 coming to 4.625

Answer 10

148/-32

Answer 11

^ forgot setp=4.625