Other Problem Solutions: Expert Help and Step-by-Step Explanation

Find the domain of the coposite function $f\circ g$
${\displaystyle f\left(x\right)=\frac{5}{x+9}}$
$g(x)=x+6$

Particles in a Gold Ring. You possess a 17.7 g pure (24-karat) gold ring. Gold has an atomic mass of 197 g/mol and anatomic number of 79. 
How many protons? 
What is pos. charge? 
With no net charge, How many electrons are in it?

Suppose that R and S are commutative rings with unites, Let $\varphi$ be a ring homomorphism from R onto S and let A be an ideal of S.
a. If A is prime in S, show that ${\displaystyle {\varphi }^{-1}\left(A\right)=\{x\in R\mid \varphi \left(x\right)\in A\}}$ is prime ${\displaystyle \in R}$.
b. If A is maximal in S, show that ${\displaystyle {\varphi }^{-1}\left(A\right)}$ is maximal ${\displaystyle \in R}$.

Lead has a specific heat of 0.030 cal/gC. In an insulated container, 300 grams of lead shot heated to 100°C and 100 grams of water heated to 70°C are combined. The mixture's final temperature is:
A) 100C 
b) 85.5C 
c)79.5C 
d) 74.5C 
e)72.5C

In figure, determine the point at which the total electric field is zero. Find ____m to the left of ${\displaystyle -2.5\times {10}^{-6}}$ C charge.

Find polynomial ${\mathbf{\text{p}}}_1\text{and}{\mathbf{\text{p}}}_2\in {\mathbb{\text{P}}}_2$ that spans the kernel of T and describes the range of sf "T".

The initial velocity v_0 of a hockey puck is 105 mi/h. Determine a) the largest value (less than 45^o) of the angle a for which the puck will enter the net, b) the corresponding time required for the puck to reach the net.

The conic for the equation ${\displaystyle {(x+1)}^2=4(-1)(y-2)}$ and also describe the translation of the from standard position.

Using Green's theorem evaluate ${\displaystyle {\oint }_C(6y+x)dx+(y+2x)dy}$ where C is the boundary of the