Applications with Decimals Exercises

Site: Saylor Academy
Course: RWM101: Foundations of Real World Math
Book: Applications with Decimals Exercises
Printed by: Guest user
Date: Monday, July 22, 2024, 10:24 PM

Description

Complete this assessment to practice calculating applications with decimals. Be sure to check your answers.

Equations with Decimals

1. Answer the following questions.

a) A car rental company charges \$22.75 per day and \$0.15 per mile. How much does it cost to rent a car for one week to drive a total of 714 miles?

2. What number must be multiplied to 3.801 to get 3.804801?

3. A pay as you call cell phone company charges \$0.50 per minute for the first 10 minutes and \$0.12 for each additional minute. How much will a 30 minute phone call cost?

4. A circle has an area of 16 \pi\ \text{in}^{2}. What is its diameter?



Source: Algebra2Go, https://www.saddleback.edu/faculty/Lperez/Algebra2Go/prealgebra/decimals/eqDeciHW.pdf
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License.

Answers


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