Answer:
<em>The aircraft has a height of 1000 m at t=2 sec, and at t=8 sec</em>
Step-by-step explanation:
<u>Finding Exact Roots Of Polynomials</u>
A polynomial can be expressed in the general form
The roots of the polynomial are the values of x for which
Finding the roots is not an easy task and trying to find a general solution has been discussed for centuries. One of the best possible approaches is trying to factor the polynomial. It requires a good eye and experience, but it gives excellent results.
The function for the trajectory of an aircraft is given by
We need to find the values of t that make H=1000, that is
Dividing by -0.5
Rearranging, we set up the equation to solve
Expanding some terms
Rearranging
Factoring
This produces our first root t=2. Now let's factor the remaining polynomial
This gives us the second real root t=8. The other two roots are not real numbers, so we only keep two solutions
Answer:40
Step-by-step explanation:
40 beacause you have to round to the nearset 10
Is there any more to the question?
Answer: C
Step-by-step explanation:
So, the original fraction is equal to