(Solved): 7. Find the second derivative of f(x)=3(x2+2)4. 8. Write the equation of the line tangent to the gr ...

7. Find the second derivative of $f(x)=3{\left(x^2+2\right)}^4$. 8. Write the equation of the line tangent to the graph of $g(x)=\sin (2x)$ at $x=\frac{?}{4}$. Solve for $\frac{dy}{dx}$. 9. $x^2+4y^3=3xy$ 10. $2\sin x\cos y=1$ 11. When satellites observe the earth, they can scan only part of the Earth's surface. Some satellites have sensors that can measure the angle $?$ where $h$ is the satellite's distance from the Earth's surface. Find the rate at which $h$ is changing with respect to $?$ when $?=30^{?}$ if $h=r(\csc ??1)$. (Assume that $r=3960$ miles.)