Answer: 
Step-by-step explanation:
The confidence interval for population proportion(p) is given by :-

, where
= Sample proportion.
n= Sample size.
z* = Critical value.
Let p = Proportion of adults in the U.S. who have donated blood in the past two years.
As per given , we have
n= 2322
Sample proportion of adults in the U.S. who have donated blood in the past two years. :
By z-table , the critical value for 90% confidence : z*= 1.645
Then, the 90% confidence interval for the population proportion of adults in the U.S. who have donated blood in the past two years will be






Hence, the 90% confidence interval for the population proportion of adults in the U.S. who have donated blood in the past two years. = 
You didn’t specify what this was for but it looks like the factors for the area of a trapezoid
in that case the answer is 12
Answer:
The answer to this problem is B, C, and E.
Step-by-step explanation:
If one yard=3ft and 1 ft=12in
then multiply 3*12
3*12=36inches
Answer:
Im pretty sure it is c
Step-by-step explanation: