Through which of the following do sperm cells travel to reach the urethra?

A. Epididymis

B. Vas deferens

C. Penis

D. Testes

Function

$$f(x)=\frac{\left(x^2-6 x+13\right)(x-2)}{x-2}$$

is undefined at $x=2$. However, if $x \neq 2$, you can cancel the $(x-2)$ factors, and the equation becomes

$$f(x)=x^2-6 x+13, x \neq 2$$

So $f$ is a quadratic function with a removable discontinuity at $x=2$ (Figure $2-2 \mathrm{~g}$ ). The $y$-value at this missing point is the limit of $f(x)$ as $x$ approaches 2 . Figare $2-2 g$

a. Show that $f(2)$ has the indeterminate form $0 / 0$. What feature does the graph of $f$ have at $x=2$ ? Do an appropriate calculation to show that 5 is the limit of $f(x)$ as $x$ approaches 2 .

b. Find the interval of $x$-values close to 2 , but not including 2 , for which $f(x)$ is within $0.1$ unit of 5 . Keep at least six decimal places for the $x$-values at the ends of the interval. Based on your answer, what is the largest value of $\delta$ for which $f(x)$ is within $\epsilon=0.1$ unit of 5 when $x$ is kept within $\delta$ unit of 2 ?

c. Draw a sketch to show how the numbers $L$, $c, \epsilon$, and $\delta$ in the definition of limit are related to the graph of $f$ in this problem.

Find the sum .

the sum of the first 80 positive integers