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Bello et al-Topics in Contemporary Mathematics 9/e (Homework)

James Finch

Math - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 17/30

Due: Wednesday, August 25, 2010 19:00 EDT

About this Assignment

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Question
Points
1 2 3 4 5 6 7 8 9 10
1/3 7 5 1 0/2 0/2 3/4 0/4 0/1 0/1
Total
17/30

Description

Here are some textbook questions from Topics in Contemporary Mathematics 9/e by Ignacio Bello, Jack R. Britton, and Anton Kaul published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. 1/3 points All Submissions Notes Question: BelloConMath9 1.1.015.
Question part
Points
Submissions
1 2 3
1 0/1 0/1
8/50 7/50 7/50
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1/3
 
Identify the pattern. List the next three terms using the labeling scheme below.
, , , , Your answer is correct., Your answer is incorrect., Your answer is incorrect.,



(a)
(b)
(c)
(d)

(e)
(f)
(g)
(h)

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2. 7/7 points All Submissions Notes Question: BelloConMath9 1.1.021.
Question part
Points
Submissions
1 2 3 4 5 6 7
1 1 1 1 1 1 1
1/50 1/50 1/50 1/50 2/50 2/50 2/50
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7/7
 
The figures represent the triangular numbers.
(a) Draw the next triangular number.

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(b) Describe the pattern and list the next three triangular numbers.
At each stage, add one Your answer is correct., one Your answer is correct. longer.
The next three triangular numbers (including the one in part (a)) are
Enter an exact number.
Your answer is correct.,
Enter an exact number.
Your answer is correct., and
Enter an exact number.
Your answer is correct..

(c) What is the fifteenth triangular number?
Enter an exact number.
Your answer is correct.

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3. 5/5 points All Submissions Notes Question: BelloConMath9 1.2.001.SBS.
Question part
Points
Submissions
1 2 3 4 5
1 1 1 1 1
2/50 1/50 3/50 2/50 2/50
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5/5
 
An investor owns 378.19 shares of a mutual fund valued at $20.14 per share. Find a reasonable estimate of the value of the investor's stock (to the nearest hundred dollars) by rounding 378.19 to the nearest 100 and $20.14 to the nearest dollar.

STEP 1: Round 378.19 to the nearest 100.
378.19 ≈
Enter an exact number.
Your answer is correct.
 
STEP 2: Round 20.14 to the nearest dollar.
$20.14 ≈ $
Enter an exact number.
Your answer is correct.
 
STEP 3: Use the rounded values to estimate the value in the following formula.
value = (price per share) · (number of shares)
≈ ($
Enter an exact number.
Your answer is correct.) · (
Enter an exact number.
Your answer is correct.)
≈ $
Enter an exact number.
Your answer is correct.

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4. 1/1 points All Submissions Notes Question: BelloConMath9 1.2.003.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
A student bought artichokes for $6.59, cucumbers for $2.32, lettuce for $4.99, tomatoes for $1.62, and broccoli for $2.79. Find a reasonable estimate of the total amount the student spent on vegetables by rounding each price to the nearest dollar.
$
Enter an exact number.
Your answer is correct.

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5. –/2 points Notes Question: BelloConMath9 2.2.007.SBS.
Question part
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Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Let set A = {1, 2, 4, 6, 7}, B = {1, 4, 5, 6} and C = {3, 4, 5}. Find the following.
A intersect (B intersect C)
STEP 1: Find B intersect C by listing in roster notation all the elements of B that are also in C.
B intersect C =
Enter a mathematical expression or equation with exact values.
 
STEP 2: List in roster notation all the elements of A that are also in B intersect C.
A intersect (B intersect C) =
Enter a mathematical expression or equation with exact values.

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6. –/2 points Notes Question: BelloConMath9 2.2.017.
Question part
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Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Let Universal Set = {a, b, c, d, e, f }, A = {a, d, f }, and B = {b, c, d, e }. Find each specified set. (Enter EMPTY for the empty set.)
(a) (A union B)'
Enter a mathematical expression or equation with exact values.


(b) A' union B'
Enter a mathematical expression or equation with exact values.

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7. 3/4 points All Submissions Notes Question: BelloConMath9 2.3.001.
Question part
Points
Submissions
1 2 3 4
1 1 1 0/1
2/50 2/50 2/50 2/50
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3/4
 
Fill in the Venn diagram to illustrate the relationships among the following sets. (Use roster notation.)
Universal Set = {1, 2, 3, 4, 5}
A = {1, 2, 3}
B = {3, 4}.
A
B U
Enter a mathematical expression or equation with exact values.
Your answer is correct.
Enter a mathematical expression or equation with exact values.
Your answer is correct.
Enter a mathematical expression or equation with exact values.
Your answer is correct.
Enter a mathematical expression or equation with exact values.
Your answer is incorrect.

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8. –/4 points Notes Question: BelloConMath9 2.4.001.SBS.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50
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0/4
 
Suppose that n(A) = 17, n(B) = 23, and n(A intersect B) = 6. Find N(A union B).

STEP 1: Use the equation for the number of elements in A union B.
n(A union B) = n(A) + n(B) − n(A intersect B)
 
STEP 2: Fill in the values and calculate.
n(A union B) =
Enter an exact number.
 +
Enter an exact number.
 −
Enter an exact number.
=
Enter an exact number.

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9. –/1 points Notes Question: BelloConMath9 2.4.003.
Question part
Points
Submissions
1
0/1
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0/1
 
Suppose that n(A) = 13, n(A intersect B) = 5, and n(A union B) = 30. Find N(B).
Enter an exact number.

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10. 0/1 points All Submissions Notes Question: BelloConMath9 2.4.005.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
On checking with 65 families, it was found that 50 families subscribe to Time, 30 to Newsweek, and 5 to neither magazine. How many subscribe to both?
Enter an exact number.
Your answer is incorrect.

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