For each question, select the best answer from the four alternatives. Which part of an electric circuit transforms electrical energy into other usable forms of energy? (a) load, (b) switch, (c) power source, (d) connecting wire.

Represent the function described in the last exercise in two different ways.

What forms of energy are provided by the sun?

Why is group insurance generally Jess expensive than individual policies?

Find the axis of symmetry for each parabola graphed in the earlier exercise.

Auto Insurance. The average cost of auto insurance rose only $1.5 \%$ from 2004 to 2005 after increasing almost $6 \%$ per year in the three years prior to 2004. The average cost from 1995 to 2005 can be modeled by the quartic function

$$\begin{aligned} f(x)=&-0.2607808858 x^4+5.281857032 x^3 \\ &-30.77185315 x^2+60.89063714 x \\ &+663.8111888 \end{aligned}$$

where $x$ is the number of years since 1995 (Source: Insurance Information Institute). Estimate the average cost of auto insurance in 1996, in 1999, and in 2004.

Describe how energy changes from a usable form to a less usable form in a building's heating system.

Use the terms (chemical energy, electrical energy, electric current, mechanical energy, sound energy, thermal energy) to complete the sentence. When the sun increases the total kinetic energy of the particles in your skin, your _____ increases.

The balance in the prepaid insurance account, before adjustment at the end of the year, is $21,700. Journalize the adjusting entry required under the following alternative for determining the amount of the adjustment: (b) the amount of unexpired insurance applicable to future periods is$5,250.

How could rounding affect your answer to the Exercise earlier?

In this exercise, verify the identity.

$$\sinh (x+y)=\sinh x \cosh y+\cosh x \sinh y$$

The current in a long solenoid of radius 3 cm is varied with time at a rate of 2 A/s. A circular loop of wire of radius 5 cm and resistance $2 \Omega$ surrounds the solenoid. Find the electrical current induced in the loop.

If a metallic material is cooled through its melting temperature at an extremely rapid rate, it forms a noncrystalline solid (i.e., a metallic glass). Will the electrical conductivity of the noncrystalline metal be greater or less than its crystalline counterpart? Why?

In this exercise, find the integral.

$$\int \frac{\cosh x}{\sinh x} d x$$