<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Dismiss
Skip Navigation

7.3: Solutions to Exercises

Difficulty Level: At Grade Created by: CK-12
Turn In

Solution to Exercise 1

'\begin{align*}a\end{align*}a is not equal to \begin{align*}0\end{align*}0'

Solution to Exercise 2

'\begin{align*}a\end{align*}a is positive'

Solution to Exercise 3

b * c

gives

a

value of \begin{align*}6\end{align*}6, and \begin{align*}5 < 6\end{align*}5<6, so this code will print 'Hello world'.

Solution to Exercise 4

The parentheses around the relational expression

a > 0

will not change its validity, so this code will print 'a is positive'.

Solution to Exercise 5

The parentheses in this expression change its meaning completely. First,

a < b

is evaluated, and since it is false for the given values of

a

and

b

,

it evaluates to zero. The zero is then multiplied by

c

,

giving

a

value of zero which is interpreted as false. So this code prints 'Goodbye world'.

Solution to Exercise 6

'\begin{align*}p1\end{align*}p1 and \begin{align*}p2\end{align*}p2 are not equal'

Solution to Exercise 7

This code will generate an error message, since

a = b

assigns the value of

b

to

a

.

To check if

a

and

b

are equal, use

a == b

.

Solution to Exercise 8

Any value that is not zero.

Solution to Exercise 9

Any value greater than or equal to \begin{align*}0\end{align*}0 and less than \begin{align*}7\end{align*}7.

Solution to Exercise 10

Any value less than \begin{align*}3\end{align*}3 or greater than \begin{align*}10\end{align*}10.

Solution to Exercise 11

Every value of

a

will print 'Hello world'.

Solution to Exercise 12

The following code will provide the desired behavior:

if n >= -0.01 && n <= 0.01
disp('a is very close to zero')
end

Solution to Exercise 13

if n >= 1 && n <= 4
CA = 16.00;
elseif n >= 5 && n <= 24
CA = 14.00;
elseif n >= 25 && n <= 99
CA = 12.70;
else
CA = 11.00;
end

Solution to Exercise 14

This code by BrieAnne Davis:

if n >= 1 && n <= 4; %if n=1 to 4, CA is $16.00
CA=16.00;
elseif n >= 5 && n <= 24; %if n=5 to 24, CA is $14.00
CA=14.00;
elseif n >= 25 && n <= 99; %if n=25 to 99, CA is $12.70
CA=12.70;
elseif n >= 100; %if n=100 or more, CA is $11.00
CA=11.00;
end %this ends the if statement for CA
if n >= 1 && n <= 9; %if n=1 to 9, CB is $24.64
CB=24.64;
elseif n >= 10 && n <= 49; %if n=10 to 49, CB is $24.32
CB=24.32;
elseif n >= 50 && n <= 99; %if n=50 to 99, CB is $24.07
CB=24.07;
elseif n >= 100; %if n=100 or more, CB is $23.33
CB=23.33;
end %this ends the if statement for CB
if n >= 1 && n <= 24; %if n=1 to 24, CC is $17.98
CC=17.98;
elseif n >= 25 && n <= 49; %if n=25 to 49, CC is $16.78
CC=16.78;
elseif n >= 50; %if n=50 or more, CC is $15.78
CC=15.78;
end %this ends the if statement for CC
if n >= 1 && n <= 9; %if n=1 to 9, CD is $12.50
CD=12.50;
elseif n >= 10 && n <= 99; %if n=10 to 99, CD is $10.42
CD=10.42;
elseif n >= 100; %if n=100 or more, CD is $9.62
CD=9.62;
end %this ends the if statement
CO=45.00;
Cunit = CO + CA + CB + CC + CD;

Solution to Exercise 15

This code was originally written by Bryson Hinton and then modified:

cunit = zeros(1,150);
c0 = 45;
for n=1:150
%compute price for part A
if n >= 1 && n <= 4
ca=16;
elseif n >= 5 && n <= 24
ca=14;
elseif n >= 25 && n <= 99
ca=12.7;
else
ca=11;
end
%compute price for part B
if n >= 1 && n <= 9
cb=24.64;
elseif n >= 10 && n <= 49
cb=24.32;
elseif n >= 50 && n <= 99
cb=24.07;
else
cb=23.33;
end
%compute price for part C
if n >= 1 && n <= 24
cc=17.98;
elseif n >= 25 && n <= 49
cc=16.78;
else
cc=15.78;
end
%compute price for part D
if n >= 1 && n <= 9
cd=12.50;
elseif n >= 10 && n <= 99
cd=10.42;
else
cd=9.62;
end
%sum cost for all parts
cunit(n)= c0 + ca + cb + cc + cd;
end
% Plot cost as a function of n
plot(1:150,cunit);
xlabel('n (units)');
ylabel('cost (dollars)');
title('Cost/unit as a function of number of units');

This code produces the plot in Figure 1

Cost as a function of number of units produced.

Cost as a function of number of units produced.

Notes/Highlights Having trouble? Report an issue.

Color Highlighted Text Notes
Please to create your own Highlights / Notes
Show More

Image Attributions

Show Hide Details
Description
Subjects:
Grades:
Date Created:
Feb 23, 2012
Last Modified:
Apr 13, 2016
Save or share your relevant files like activites, homework and worksheet.
To add resources, you must be the owner of the section. Click Customize to make your own copy.
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original
 
CK.ENG.ENG.SE.1.Engineering-Matlab.7.3
Here