Answer: The 90% confidence interval for the population mean μ is between 82.85 and 85.15,
Step-by-step explanation:
When population standard deviation is not given ,The confidence interval population proportion is given by (
):-
, where n= Sample size.
s= Sample standard deviation
= sample mean
t* = Critical t-value (Two-tailed)
As per given , we have
n= 64
Degree of freedom : df = n-1=63
s= 5.5
Significance level : 
Two-tailed T-value for df = 63 and would be
(By t-distribution table)
i.e. t*= 1.669
The 90% confidence interval for the population mean μ would be
∴ The 90% confidence interval for the population mean μ is between 82.85 and 85.15,
Since Sin is equal to opposite over hypotenuse
so that's mean Sin(60°) = 
#I just rounddown from angle 65° to 60° as the number is not that much different.
and Sin(60°) is equal to 
so we got Sin(60°) = =
x = 
x ≈ 14
then we can answer C)14.5
the answer D) is not correct for sure because the opposite cannot be longer than hypotenuse in the Right Triangle form.
Step-by-step explanation:
put the value of y and get the value of x.then plot it in graph.(try to get non fractional values)
The answer would be:
70,000,000+8,000,000+600,000+20,000+1,000+80+7.
Pretty sure that's the answer...
