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(1) A package of cookies contains 6 cookies. Each package of cookies costs $1.49.​

A function, f(x), is written to represent the cost of purchasing x packages of cookies.

What is the practical domain for the function f(x)?

 

all positive integers

all whole numbers

all real numbers

all whole numbers that are multiples of 6

 

(2) A company wants to determine the level of interest among its employees for an annual summer picnic.The company wants to survey 200 employees.

What is the best way to randomly choose these 200 employees?

 

Use employee identification numbers to randomly select 200 employees.

Survey the first 200 people to enter the company cafeteria.

Choose 50 people from 4 of the 7 divisions at the company.

Select the first 200 employees to arrive at work Monday morning.

 

(3) A spinner is divided into four equal sections that are numbered 2, 4, 7, and 9. The spinner is spun twice.

How many outcomes have a product less than 30 and contain at least one odd number?

 

5

6

8

10

 

 

Bold are my answers. Really struggled with #3. Thank you so much in advance!! 

 May 18, 2019
 #1
avatar+8724 
+3

1)

 

A package of cookies contains 6 cookies. Each package of cookies costs $1.49.​

A function, f(x), is written to represent the cost of purchasing x packages of cookies.

What is the practical domain for the function f(x)?

 

I would choose "all whole numbers" because  0  should be included in the practical domain.

 

(You can buy  0  packages of cookies.)

 

The only difference between "all positive integers" and "all whole numbers" is that  0  is

included in "all whole numbers."  smiley

 May 18, 2019
 #2
avatar+294 
+1

Cool! thank you, the only reason I thought maybe it was all positive integers is because it was asking for the practical domain of the function f(x) instead of just x. 

KennedyPape  May 18, 2019
 #3
avatar+8724 
+3

2) 

 

A company wants to determine the level of interest among its employees for an annual summer picnic. The company wants to survey 200 employees. What is the best way to randomly choose these 200 employees?

 

If we surveyed the first 200 people to enter the cafeteria, then the result might be biased because the type of person to enter the cafeteria early might be the type of person to want a picnic more. Kind of like if you wanted to determine the level of interest a school has of making math class last for twice as long, you wouldn't want to just ask the first 200 people that turn in their math test.

 

Randomly selecting 200 employee ID numbers would probably be the best method.

 May 18, 2019
edited by hectictar  May 18, 2019
 #4
avatar+8724 
+3

3)

 

A spinner is divided into four equal sections that are numbered 2, 4, 7, and 9. The spinner is spun twice.

How many outcomes have a product less than 30 and contain at least one odd number?

 

Here's the "dumb" way to do it, haha laughlaugh

 

List of all possible outcomes:

2, 2

2, 4

2, 7

2, 9

 

4, 2

4, 4

4, 7

4, 9

 

7, 2

7, 4

7, 7

7, 9

 

9, 2

9, 4

9, 7

9, 9

 

The ones that have a product less than 30 and contain at least 1 odd number are colored blue.

 

You got it right smiley

 May 18, 2019
 #5
avatar+294 
+1

THANK YOU SO MUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

KennedyPape  May 18, 2019

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