A product contains three lasers, and the product fails if any of the lasers fails. Assume the lasers fail independently. What should the mean life equal in order for 99% of the products to exceed 10,000 hours before failure?

In each of the following sentences, circle any pronoun with an ambiguous reference. Then, on the line provided, rewrite the sentence to correct the ambiguous pronoun reference. Connie was glad to give Leta a ride home whenever she did not have play rehearsal

Sketch the graph of each of the following functions: y = x

Without glasses, your Uncle Albert can see things clearly only if they are between $35 \mathrm{~cm}$ and $160 \mathrm{~cm}$ from his eyes. What is your uncle's near point when wearing these glasses?

Can a reference angle have a negative measure? Justify your reasoning.

In each of the following sentences, circle any pronoun with an ambiguous reference. Then, on the line provided, rewrite the sentence to correct the ambiguous pronoun reference. After my parents and my friends met, they)acted as if they had always known them,

According to Riis, why should all Americans be concerned about tenement children?

Explain why knowing the location of the center and one point on a circle is enough to graph the circle?

Satellite A has a mass of $1000 \mathrm{~kg}$ and satellite $B$ has a mass of $2000 \mathrm{~kg}$.Calculate the orbital periods of satellites $\mathrm{A}$ and $\mathrm{B}$.

The number of days p it takes a planet in our solar system to make one revolution around the Sun is about $p=2 \cdot 10^{-10} r^{\frac{3}{2}}$, where $r$ is the mean orbital radius in kilometers. How far would a planet have to be from the Sun to take 10,000 days for a revolution?

From the graph of g, state the intervals on which g is continuous.

The length of time to failure (in hundreds of hours) for a transistor is a random variable Y with distribution function given by

$$F ( y ) = \left\{ \begin{array} { l l } { 0 , } & { y < 0 } \\ { 1 - e ^ { - y ^ { 2 } } , } & { y \geq 0 } \end{array} \right.$$

Find f (y).

Find the reference angle for the given angle.

$$- \frac { 19 \pi } { 4 }$$

You purchase a $1500-\mathrm{W}$ electric heater to heat your room. How many $\mathrm{kW}$ is this?