Answer:
The null hypothesis is 
The alternate hypothesis is 
Step-by-step explanation:
To investigate this further, the economist would like to test the claim that the percent of thirty-year fixed-rate mortgage loans that have a 4.75 percent interest rate is less than 22%.
At the null hypothesis, we test that the proportion is of 22%, that is:

At the alternate hypothesis, we test that the proportion is less than 22%, that is:

If you're finding the value of z, z would equal 13/2 or 6.5
:)
Answer:
Step-by-step explanation:
Check attachment for solution
Answer:
cylinder surface area = 201.06in²
surface area of cone = 56.56in.²
Step-by-step explanation:
cylinder surface area formula = 2πrh + 2πr²
refer the pic
cone surface area formula = πr ( r + √h² + r² )
refer the sec pic
surface area of the solid
= ( 201.06 + 56.56 ) in.²
= 257.62in.²
= 258in.²