Answer
r = 20.25
this is the awnser i know im only in 6th grade but im good at math
 
        
             
        
        
        
You can solve this in two ways.
First way:
Let’s find out how many my friend makes in one minute.
12/5=2.4
He makes 2.4 in one minute. Let’s multiply that by 20 to find what he makes in 20 minutes.
2.4•20=48
My friend made 48 desserts.
Second way:
Let’s make a ratio.
12 desserts:5 minutes
X desserts: 20 minutes
Whatever you do to one side, you have to do to the other. Since you are multiplying the minutes by 4, you have to multiply the desserts by 4.
12•4=48
So, my friend made 48 desserts. 
Tell me if this helps!!!
        
             
        
        
        
The parameter of the study's population is the 80% of all customers who shopped in the chain's stores that were interested in the home delivery service.
Population parameter is defined as any summary number that describes the entire population. It can be an average or a percentage/
The 1,000 customers that were surveyed are the sample of the population. They basically represent the population of the chain's customers. 
        
                    
             
        
        
        
Answer:
Rational: all
Integers: 4, -36, -6
Step-by-step explanation:
A rational number is a number that can be written as a fraction of integers.
All numbers shown are rational numbers.
The integers are all positive and negative whole numbers and zero.
The integers are: 4, -36, -6