Step-by-step explanation:
We have,
If a quadratic equation with real coefficients has a discriminant of -36.
The general form of quadratic equation is :

The discriminant of this equation is : 
If D=0, it will have 1 real roots
If D>0, it will have 2 real roots
If D<0, it will have no real roots
We have,
D = -36 < 0, so, the quadratic equation will have no real roots.
For this case we have the following equation:

Where,
w: The weight of a spring in pounds
E: the energy stored by the spring in joules.
Substituting values we have:

Making the corresponding calculation:
Answer:
the approximate weight of the spring in pounds is:
Answer:
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Step-by-step explanation:
Given


Required
Determine the %decrease
First, we need to determine the amount paid



The percentage decrease is the calculated as follows:

In this case;


So; we have:





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<em> (Approximated)</em>
a. At its maximum height, the ball has zero vertical velocity, so


b. The ball's height in the air
at time
is given according to

Solve for
when
:

Answer:
fifth oeriod and jeffersons road
Step-by-step explanation:
because on the first the average is higher and on the second the mean (quadrent 2) is fartheralong than the other road and although the other has an outlier it isnt strong enough to skew the data to being higher