Question

A hot air balloon is rising. The expression 120 + 2t represents theheight of the hot air balloon in meters after t seconds. Use theexpression to find the height of the balloon after 15 s.Show your work. .

Answer 1

We are told that the height of the ballon after t seconds is given by the equation

`\text{height}=120+2t`

and we are asked to find the height after 15 seconds.

To answer this question we simply put in t =15 in the above formula to get

`\text{height}=120+2(15)`

This gives

`\text{height}=120+30`
`\text{height}=150m`

Hence, the height of the ballon after 15 s is 150m

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