Applications with Decimals Exercises

1. $\begin{aligned} \text { Total Cost } &=7(22.75)+714(0.15) \\ &=159.25+107.10 \\ &= 266.35 \end{aligned}$

2. $\begin{aligned} \frac{3.801 \cdot x}{3.801} &=\frac{3.804801}{3.801} \\ x &=1.001 \end{aligned}$

3. $\begin{aligned} \text { First } &+\text { Additional } \\ 30=10 &+ 20 \\ \text { Total Cost } &=10(0.50)+20(0.12) \\ &=5.00+2.40 \\ &=7.40 \end{aligned}$

4. $A = \pi r^2$

$\frac{16 \pi}{\pi} = \frac{\pi r^2}{\pi}$

$16 = r^2$

$4 = r$

$d=2r$

$d=2(4)$

$d = 8 in$