4. The use of wind power is growing rapidly. Global wind power generating

1 answer:

Ivan3 years ago

6 0

In 1980, wind turbines in Europe generated about 5 gigawatt-hours of energy. Over the next 15 years, the amount of energy increased about 59% (each year). How many gigawatt-hours were generated

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AleksAgata [21]

Simplified: 19w^5 - 3075

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3 years ago

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tekilochka [14]

I believe its D, 7.5% But check it with other sources because IM not 100% positive!

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Andrew calculates that 40 % 40% of 50 % 50% of x x is equal to 20 % 20% of 30 % 30% of y y, where x ≠ 0 x≠0. Which of the follow

Shtirlitz [24]

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3 years ago

An isosceles trapezoid ABCD with height 2 units has all its vertices on the parabola y=a(x+1)(x−5). What is the value of a, if p

horrorfan [7]

Answer:

a = -0.3575

Step-by-step explanation:

The points A and D lie on the x-axis, this means that they are the x-intercepts of the parabola, and therefore we can find their location.

The points A and B are located where

$y=a(x+1)(x-5)=0$

This gives

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Now given the coordinates of A, we are in position to find the coordinates of the point B. Point B must have y coordinate of y=2 (because the base of the trapezoid is at y=0), and the x coordinate of B, looking at the figure, must be x coordinate of A plus horizontal distance between A and B, i.e

$B_x=A_x+\frac{2}{tan(60)} =-1+\frac{2\sqrt{3} }{3}$