Chapter 1, Problem 21CRP

a.

Explanation of Solution

Does $100/5=20?$

The ASCII code is a set of characters that stands for “American Standard Code for Information Interchange”.

• To encode the sentence use the ASCII code table as shown below:

• Convert the sentence in hexadecimal notation from the above table.

$\begin{array}{c}\text{D}=44\\ \text{o}=6\text{F}\\ \text{e}=65\\ \text{s}=73\end{array}$

$\begin{array}{c}=20\left(\text{space}\right)\\ 1=31\\ 0=30\\ 0=30\end{array}$

$\begin{array}{c}/=2\text{F}\\ 5=35\\ =20\left(\text{space}\right)\\ ==3\text{D}\left(\text{equal}\text{to}\right)\end{array}$

$\begin{array}{c}=20\left(\text{space}\right)\\ 2=32\\ 0=30\\ ?=3\text{F}\end{array}$

• To represent the hexadecimal notation in bit pattern, convert the hexadecimal notation into bit as shown below:

$\begin{array}{c}44=01000100\\ 6\text{F}=01101111\\ 65=01100101\\ 73=0111011\end{array}$

$\begin{array}{c}20=00100000\\ 31=00110001\\ 30=00110000\\ 30=00110000\end{array}$

$\begin{array}{l}2\text{F}=00101111\\ 35=00110101\\ 20=00100000\\ 3\text{D}=00111101\end{array}$

$$

b.

Explanation of Solution

The total cost is $\$7.25$.

The ASCII code is a set of characters that stands for “American Standard Code for Information Interchange”.

• To encode the sentence use the ASCII code table as shown below:

• Convert the sentence in the hexadecimal notation from the above table.

$\begin{array}{c}\text{T}=54\\ \text{h}=68\\ \text{e}=65\\ =20\end{array}$

$\begin{array}{c}\text{t}=74\\ \text{o}=\text{6F}\\ \text{t}=\text{74}\\ \text{a}=61\end{array}$

$\begin{array}{c}\text{I}=\text{6C}\\ =\text{20}\left(\text{space}\right)\\ \text{c}=\text{63}\\ \text{o}=\text{6F}\end{array}$

$\begin{array}{c}\text{s}=73\\ \text{t}=74\\ =20\\ \text{i}=69\end{array}$

$\begin{array}{c}\text{s}=73\\ =20\left(\text{space}\right)\\ \$=24\\ 7=37\end{array}$

$\begin{array}{c}.=2\text{E}\\ 2=32\\ 5=35\\ .=2\text{E}\end{array}$

To represent the hexadecimal notation in bit pattern, convert the hexadecimal notation into bit as shown below:

$\begin{array}{c}54=01010100\\ 68=01101000\\ 65=01100101\\ 20=00100000\end{array}$

$\begin{array}{c}74=01110100\\ 6\text{F}=01101111\\ 74=01110100\\ 61=01100001\end{array}$

$\begin{array}{c}6\text{C}=01101100\\ 20=00100000\\ 63=01100011\\ 6\text{F}=01101111\end{array}$

$\begin{array}{l}73=00110000\\ 74=01110100\\ 20=0010000\\ 69=01101001\end{array}$

$\begin{array}{c}73=00110000\\ 20=0010000\\ 24=00100100\\ 37=00110111\end{array}$

$\begin{array}{c}2\text{E}=00101110\\ 32=00110010\\ 35=00110101\end{array}$