Suppose a baseball is thrown vertically upward from the ground with an initial velocity of Subscript[v, 0] ft/s. Its height above the ground after t seconds is given by s(t)=-16 t^2+Subscript[v, 0]t. Determine the initial velocity of the ball if it reaches a high point of 128 ft.

90.5

Step-by-step explanation:

Velocity is a time-derivative of displacement or the height, in this case.

At maximum height, the velocity is 0 and the height is 128.

Substitute these values into both equations above,

From the first equation,

Substitute for .

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0