Answer:
D
Step-by-step explanation:
Negative means it goes down and if its linear then th line needs to be straight.
Answer:
the answer is 67 coins are not Nickels
Step-by-step explanation:
29+24+16=67 so there is 27 Nickels in the jar
Answer:
We need a sample size of least 119
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
Sample size needed
At least n, in which n is found when 
We don't know the proportion, so we use 
, which is when we would need the largest sample size.
Rounding up
We need a sample size of least 119
Answer:
24
Step-by-step explanation:
you can just search it 20% of 120
Answer:
k=2/5
Step-by-step explanation:
It is the ratio of the amounts y and x:
k = y/x
Put another way: y = kx
