Answer:
x= -10
if u need explanation pls let me know
<h2>
Rate at which area is increasing is 1.08 m²/s.</h2>
Step-by-step explanation:
Area of triangle is with side a and b and angle C between them is given by
A = 0.5 ab SinC
Here we need to find how area changes with a and b fixed and C is changing,
![\frac{dA}{dt}=\frac{d}{dt}\left (0.5 absinC\right )\\\\\frac{dA}{dt}=0.5ab\frac{d}{dt}\left (sinC\right )\\\\\frac{dA}{dt}=0.5abcosC\frac{dC}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7BdA%7D%7Bdt%7D%3D%5Cfrac%7Bd%7D%7Bdt%7D%5Cleft%20%280.5%20absinC%5Cright%20%29%5C%5C%5C%5C%5Cfrac%7BdA%7D%7Bdt%7D%3D0.5ab%5Cfrac%7Bd%7D%7Bdt%7D%5Cleft%20%28sinC%5Cright%20%29%5C%5C%5C%5C%5Cfrac%7BdA%7D%7Bdt%7D%3D0.5abcosC%5Cfrac%7BdC%7D%7Bdt%7D)
We have
a = 8 m
b = 9 m
![C=\frac{\pi}{3}rad\\\\\frac{dC}{dt}=0.06rad/s](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B%5Cpi%7D%7B3%7Drad%5C%5C%5C%5C%5Cfrac%7BdC%7D%7Bdt%7D%3D0.06rad%2Fs)
Substituting
![\frac{dA}{dt}=0.5\times 8\times 9\times cos\left ( \frac{\pi}{3}\right )\times 0.06\\\\\frac{dA}{dt}=1.08m^2/s](https://tex.z-dn.net/?f=%5Cfrac%7BdA%7D%7Bdt%7D%3D0.5%5Ctimes%208%5Ctimes%209%5Ctimes%20cos%5Cleft%20%28%20%5Cfrac%7B%5Cpi%7D%7B3%7D%5Cright%20%29%5Ctimes%200.06%5C%5C%5C%5C%5Cfrac%7BdA%7D%7Bdt%7D%3D1.08m%5E2%2Fs)
Rate at which area is increasing is 1.08 m²/s.
Remember this:
Denominator multiplies with the whole number(number on the side) The sum of that plus the numerator will give you the value for the numerator in the improper fraction. The denominator will stay the same.
Now try it on your own!
12×2+7=numerator.
The answer is C: No the percentage of students that prefer sports is higher than the percentage of those that prefer movies! Hope this helps.
Can you please explain? Or maybe continue your question please?