Question

. A football is punted into the air. Its height h, in metres, after t seconds is given by the equation h = ?4.9t2 + 24.5t +1. How high is the ball after 1 second?

Answer 1

Answer:

  After 1 second ball is 20.6 meters high.

Explanation:

 A football is punted into the air. Its height h, in metres, after t seconds is given by the equation, h = -4.9t² +24.5t + 1

 We need to find height when t = 1 second.

 Substituting,

      h = -4.9t² +24.5t + 1

          = -4.9 x 1² + 24.5 x 1 + 1

          = 20.6 meters.

    After 1 second ball is 20.6 meters high.

Answer 2

Answer: After 1 second, the ball is 30.4 meters high.

Step-by-step explanation:

Hi, to answer this question we simply have to substitute t=1 in the equation given:

h = 4.9t2 + 24.5t +1

Replacing t (seconds) by 1 (second)

h= 4.9 (1) ^2 + 24.5 (1) +1

Solving for h:

h= 4.9 (1) +24.5 +1

h= 30.4 meters

After 1 second, the ball is 30.4 meters high.

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