Steve kicks a football into the air. the path that a ball takes can be described by the equation h=20t - 5t squared where h is the height of the ball in meters and t is time in seconds.
after how many seconds will the ball be 25 meters high?

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true