Question

The change in altitude of a bird after 2 __ 1 2 seconds was –41 __ 1 4 feet. What was the average change in altitude of the bird in feet per second?

Answer 1

`Average\ Change = -1(7)/(10) ft/s`

Explanation:

Given

`Altitude\ Change = -4(1)/(4) \ ft`

`Time = 2(1)/(2)\ s`

Required

Determine the average change

This is calculated as follows:

`Average\ Change = (Altitude\ Change)/(Time)`

This gives:

`Average\ Change = (-4(1)/(4))/(2(1)/(2))`

`Average\ Change = -4(1)/(4)/2(1)/(2)`

Convert to improper fractions

`Average\ Change = -(17)/(4)/(5)/(2)`

Convert to multiplication

`Average\ Change = -(17)/(4)*(2)/(5)`

`Average\ Change = -(17)/(2)*(1)/(5)`

`Average\ Change = -(17)/(10)`

`Average\ Change = -1(7)/(10) ft/s`