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MATH 120 MYMATHLAB HOMEWORK CHP 1-3 QUESTIONS AND 100% CORRECT ANSWERS 2024
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MATH 120 MYMATHLAB HOMEWORK CHP 1-3 QUESTIONS AND 100% CORRECT ANSWERS 2024
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MATH 120 MYMATHLAB HOMEWORKCHP 1-3 QUESTIONS AND 100%
CORRECT ANSWERS 2024
Briefly describe the Understand-Solve-Explain approach to problem solving, giving examples of things
that should be considered in each step.
What is the "Understand" step of this part of the problem solving approach? - ANSWERUThe
"Understand" step is to think about what the problem asks to be determined.
What does the "Solve" step of this part of the problem solving approach? - ANSWERUThe "Solve" step is
to carry out the required steps and calculations.
What are units? Describe how units can help to check ANSWER s and solve problems. Give examples.
What are units? - ANSWERUUnits are words that describe what is being measured or counted.
Describe how units can help to check the ANSWER s and solve problems. Give examples. -
ANSWERUConsider a box with the side lengths in inches. The volume of the box would be calculated in
cubic inches. The key word "cube or cubic" in this context means that the unit inches is raised to the
third power. The mathematical symbol to represent the unit of the volume of the box is
"in ^3."
Decide whether the following statement makes sense or does not make sense. Explain your reasoning.
I drove at a speed of 35 miles for the entire trip.
Choose the correct ANSWERUbelow. - ANSWERUThe statement does not make sense because miles is not
a unit of speed.
Decide whether the following statement makes sense (or is clearly true) or does not make sense (or is
clearly false). Explain your reasoning.
To figure out how long an airplane will take to reach Beijing, divide the distance to Beijing by the
airplane's speed. - ANSWERUThe statement makes sense because time is equal to distance divided speed.
,Evaluate the following expressions.
2/5 x 5/9. 1/4 + 5/8 - ANSWERU2/9 7/8
Write as a fraction in lowest terms.
.68 - ANSWERU17/25
Write each of the following as a common fraction.
. The common fraction for 8.5
(Simplify your ANSWER .) - ANSWERU17/2
The common fraction for
4.091 - ANSWERU4091/1000
Convert the following fractions to decimal form.
(Round to the nearest thousandth as needed.) - ANSWERU3/5=0.6
The decimal form of 1/10
(Round to the nearest thousandth as needed.) - ANSWERU.1
Write out the three steps of the Understand-Solve-Explain process when ANSWER ing the following
question.
How fast does Earth rotate? Note that in one full rotation of Earth, a point on the equator travels about
25,000 miles in 24 hours. - ANSWERUThe speed
What is the speed of the Earth? - ANSWERU1041.7 miles per hour.
Explain why the speed of the Earth makes sense. Choose the correct ANSWERUbelow. - ANSWERUspeed=
distance/time=
,25,000 miles/24hours
How much will a person pay for
14.7
pounds of bananas at a price of
$2.41
per pound? - ANSWERUThe price the person will pay is
35.43
dollars. (Round to the nearest cent.)
Complete parts (a) through (c) below.
a.
A warehouse is 65 yards long, 32 yards wide, and 7 yards high. What is the area of the warehouse floor?
If the warehouse is filled to half its height with tightly packed boxes, what is the volume of the boxes?
b.
A room has a rectangular floor that measures 27 feet by 13 feet and a flat 8-foot ceiling. What is the area
of the floor and how much air does the room hold?
c.
A grain silo has a circular base with an area of 155 square feet and is 23 feet tall. What is the total
volume? - ANSWERUa) The area of the warehouse floor is 2080yd2.
(Type an integer or a decimal.)
The volume of the boxes in the warehouse is
7280^2yd cubed .
b. The area of the floor is
351^2
ft squared .
The amount of air the room can hold is
2808ft^3 cubed .
c. The volume of the grain silo is
3565^3ft cubed .
, Identify the units of the following quantities. State the units mathematically and in words.
Your average speed on a long walk, found by dividing distance traveled in milesmiles by time elapsed in
minutes. - ANSWERUmi/min
What are the units in words? - ANSWERUmiles per minute
Consider the following exam question and student solution. Determine whether the solution is correct. If
it is not correct, write a note to the student explaining why it is wrong and give a correct solution.
Exam question: You can buy a 34-pound bag of flour for $66 or you can buy a 1-pound bag for $0.39.
Compare the per pound cost for the large and small bags.
Student solution: The large bag price is
34÷$6=$5.67 per pound, which is much more than the39¢ per pound price of the small bag. -
ANSWERUThe student's solution is incorrect. The student's division gives an ANSWERUwith units of
pounds per dollar, but he should seek an ANSWERUin dollars per pound. The ANSWERUin dollars per
pound is
$. 18
per pound, which is less than the
$0.39
per pound for the smaller bag. (Round to the nearest cent as needed.)
A commuter train travels 33 miles in 28 minutes. What is its speed in miles per hour? - ANSWERUThe
speed is approximately
70.7 mi / hr
Round to the nearest tenth as needed.
The 2013 online library from the University of California at Los Angeles (UCLA) states "The World Wide
Web has a lot to offer, but not all sources are equally valuable or reliable" (UCLA 2013). The online library
suggests specific points to consider including evaluating the audience, determining the purpose of the
information, completeness, comparing to other sources, and general critical thinking skills in determining
if the information is credible.
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