Answer:
Step-by-step explanation:
Given that
Population mean 
std deviation 
= 12
sample size n =36
Sample mean = 
(Two tailed test)
Mean difference = 7
Std error =
Since population std dev is known and n>30 we use Z test
Z statistic = 
p value <0.001
Since p value is <0.01, at 1% significance level, we reject H0.
There is significant difference between sample mean and population mean.
225 is the final answer, hope that this helps you.
=)
How can you solve it if you don't know the equations? :P Just kidding...
n+d=22, so we can say that d=22-n
5n+10d=120, and using d found above in this equation gives you:
5n+10(22-n)=120
5n+220-10n=120
-5n=-100
n=20, and since d=22-n, d=2
So there are two dimes and twenty nickels...
check...
20(5)+2(10)=100+20=120 cents which is $1.20
n+d=22, 20+2=22, 22=22
Step-by-step explanation:
the area is
will max if
a. x = 2
and the max area is
b 32
I did my calculation and your answer should be 87.9
hope this helped :)
