This is a separable first order differential equation as an initial value problem.

Divide both sides by y².

Multiply both sides by dx.

Integrate both sides.


Multiply both sides by -1

(where

)
Now, isolate y on one side of the equation.

That's the general solution. Now, plug in the value x=-1 and y=2.


The final solution is the following:

I hope this helps! If you need any clarifications, feel free to comment! :)
They did not write cos 0.1446° so i will assume this is in radians.
with radian mode calculator
cos 0.1446 = 0.9896
So you will need to find the height, and we can do so by using the pythagorean theorem, which is
. Using this formula, we can make the equation 
Firstly, solve the exponents: 
Next, subtract 225 on both sides: 
Lastly, square root both sides, and your answer is h = 20.
Now that we got the height, we can solve for the volume, which is
. Using this formula, we can form our equation to be 
Firstly, solve the exponent: 
Next, multiply 225 and 20/3, and your answer will be V = 1500π, or the third option.
Answer:
2x8=16
3x5=15
Step-by-step explanation: I hope you have/had an amazing day<3