Atennis ball machine serves a ball vertically into the air from a height of two feet, with an initial speed of 120 feet per second. after how many seconds does the ball attain its maximum height? round to the nearest whole foot

After 3.73 seconds ball will achieve the maximum height.

Step-by-step explanation:

Initial speed of the tennis ball is u = 120 feet per second

Since at the maximum height ball's final speed will be = 0

So we will apply the formula of motion against gravitational pull

v = u - gt

Where v = speed of the ball at maximum height

u = initial speed

g = gravitational pull = 32.17 ft/sec²

t = time to achieve maximum height

Here v = 0 so

0 = 120 - (32.17)t

t = 120/32.17 = 3.73 seconds

y=mx+b

step-by-step explanation:

m is slope, b is y-intercept

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.