Answer:
y= 21/2(3)
Step-by-step explanation: Use exact numbers.
y = ___
You have to know the difference in change, so you do 59-31 and you get 28, then since you want to know the change in percent you divide the difference, which is 28 and divide that by 31, which is the original amount consumed, and you get 28/31, and you get .90 which is 90%
Answer:
С. .
This method of sampling is unbiased.
Explanations:
A method of sampling is referred to as bias when there is an imbalance in the sampling probability among members of the total population.
In this example, we have a survey sampling that involves anonymous members, there's no way the sampling probability can be lowered for some members than others because members of the whole population are unknown.
This is a fair sampling method and it is unbiased.
Answer:
b=12
Step-by-step explanation:
a^2+b^2=c^2
(9×9) + b^2= 15×15
81+ b^2= 225
-81. -81
b^2=144
√. √
b= 12
