College Algebra, 4th Edition

Applying the Concepts

1. 41.

   1. $f(x)={\displaystyle \frac{1}{33.81}}x;$ domain: $[0,\infty );$ range: $[0,\infty )$

   2. 0.0887; it means that 3 $\text{oz}=0.0887\text{liter}.$

   3. 0.3549

2. 43.

   1. No d-intercept because $d\ge 0;$ y-intercept: 1. It means that the ­pressure at sea level $(d=0)$ is 1 atm.

   2. $P(0)=1,P(10)\approx 1.3,P(33)=2,P(100)\approx 4.03$

   3. 132 ft

3. 45.

   1. $C=50x+6000$

   2. The y-intercept is the fixed overhead cost.

      

   3. 110

4. 47.

   1. $R=900-30x$

   2. $720

   3. Ten days after the first of the month

5. 49. 70

6. 51.

   1. $y={\displaystyle \frac{2}{27}}(x-150)+30$

   2. 45

   3. $690\text{ mg }/{\text{m}}^3$

7. 53.

   1. 

   2. 1. $480

      2. $800

      3. $2600

   3. 1. $15,000

      2. $26,667

      3. $45,000