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Naddika [18.5K]
3 years ago
10

Help plz? i don’t understand the example

Mathematics
1 answer:
nataly862011 [7]3 years ago
7 0

Answer:

The example is telling you to first add up each number then divide by the amount of numbers that are present in the set. There are four in this example.

Secondly the difference between each data point will differ from each number. Basically subtract the sum from each number. Which is 5 in this case. But if its negative flip it to a positive.

Then add up each absolute value and divide by 4 twice.

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the total cost would be $15,900

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8. A model airplane is shot into the air. Its path is approximated by the
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Here is another one of those " quadratic word problems " at hand, which is great!

By the function that is given to us ( which I believe is meant to be h(t) = - 5t^2 + 251 ) the airplane is launched at a height of 251 metres, with no velocity. Anyhow, we need to determine the duration with which the airplane will strike the ground, and to do so we can set up the following equation, - 5t^2 + 251 = 0 - solving for t, otherwise known to be the time!

See the procedure below -

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t^2=\frac{251}{5} - And, now isolate t, receiving two solutions,

t=\sqrt{\frac{251}{5}},\:t=-\sqrt{\frac{251}{5}}

However, time can't be a negative value. Thus our solution is \sqrt{251 / 5}, which is ( about ) 7.085 seconds!

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