AnswersAlgebra III AMultiplying and Dividing Rational Expressions

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Which statements are true about rational expression multiplication? Check all that apply.The closure property states that the sum of two rational expressions is an irrational number.Rational expressions are closed under multiplication.The commutative property states that changing the order of two or more factors does not change the value of the product.The associative property states that the way in which two or more factors are grouped in a product changes the value of the product.The properties of rational expression multiplication are parallel to the properties of rational number multiplication.

A
The closure property states that the sum of two rational expressions is an irrational number.
B
Rational expressions are closed under multiplication.
C
The commutative property states that changing the order of two or more factors does not change the value of the product.
D
The associative property states that the way in which two or more factors are grouped in a product changes the value of the product.
E
The properties of rational expression multiplication are parallel to the properties of rational number multiplication.
2
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In regard to exercise, which of the following statements about safety consideration is correct?

A
In hot weather, exercising between 10 a.m. and 4 p.m. is best.
B
Exercising at 100% of your maximum heart rate is best.
C
Exercising one hour before eating is best.
D
Remaining well-hydrated while exercising is best.
3

The cardiovascular system helps move hormones throughout the body during exercise.

A
T
B
F
4

When it comes to cholesterol, it is better to have __________.

A
more cholesterol
B
more LDL
C
a high ratio of LDL to HDL
D
more HDL
5

Making it a point to work out with a friend is an example of a fitness goal.

A
T
B
F
6

What is the impact of arteriosclerosis?

A
inefficient blood flow
B
increased artery elasticity
C
arterial plaque deposition
D
reduced blood clotting
7

White blood cells prevent the loss of blood by causing clotting. Please select the best answer from the choices provided.

A
T
B
F
8

The muscular and cardiovascular systems can both be overloaded during exercise.

A
T
B
F
9

As exercise levels increase, which of the following physiological changes occurs in the respiratory system?

A
The respiratory muscles shrink.
B
The lungs expand in size.
C
The trachea widens.
D
The airways narrow.
10

The most important step for preventing cardiovascular disease is to live a healthy lifestyle.

A
T
B
F
11

Which of the following is the most important reason to maintain a high level of cardiovascular health?

A
A higher level of fitness makes it easier to develop larger muscles.
B
A higher level of fitness makes you more attractive to other people.
C
A higher level of fitness allows you to live a longer, healthier life.
D
A higher level of fitness improves your IQ.
12

Which of the following is the BEST reason to rest muscle groups between workouts?

A
It allows the muscles to store more energy.
B
It allows you to focus on other muscle groups.
C
It allows the muscles time to heal.
D
It allows the muscles to properly overload.
13

What distinguishes atherosclerosis from arteriosclerosis?

A
Arteriosclerosis can lead to blood clots.
B
Atherosclerosis is characterized by plaque buildup.
C
Arteriosclerosis results in inefficient blood flow.
D
Atherosclerosis is a general term for artery hardening.
14

It is possible to improve cardiovascular fitness without increasing respiratory fitness.

A
T
B
F
15

For a typical person who leads a sedentary lifestyle, a typical maximum oxygen intake level would be __________.

A
20 ml/kg/min
B
35 ml/kg/min
C
50 ml/kg/min
D
70 ml/kg/min
16

Which of the following BEST describes cardiovascular fitness?

A
the ability of the body to do prolonged work
B
the ability of the body to transport oxygenated blood efficiently
C
the ability of the body to quickly shed fat
D
the ability of the body to convert sugar into energy
17

As people age, they become unable to control their cardiorespiratory fitness levels.

A
T
B
F
18

The failure to deliver blood to the heart due to a narrowing of arteries results in __________.

A
atherosclerosis
B
a stroke
C
coronary heart disease
D
hypertension
19

Which of the following is NOT true about experiencing pain during exercise?

A
The motto "no pain, no gain" can be dangerous.
B
You should stop exercising if you feel dizzy or are unable to breathe.
C
You should jog around to stabilize any pain during exercise.
D
You should not feel pain during cardiovascular exercise.
20

What's the first step one should take when determining the amount of overload to include in an exercise program?

A
consulting the Internet for exercise plans
B
asking around at a local gym
C
assessing your current level of fitness
D
asking a health-conscious friend

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