Answer:
1,082
Step-by-step explanation:
The sample size n in Simple Random Sampling is given by
where
z = 1.645 is the critical value for a 90% confidence level (*)
s = 2 is the estimated population standard deviation
e = 0.1 mm points is the margin of error
so
rounded up to the nearest integer.
So the manufacturer should test 1,083 parts.
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(*)This is a point z such that the area under the Normal curve N(0,1) outside the interval [-z, z] equals 10% = 0.1
It can be obtained in Excel with
NORMINV(1-0.05,0,1)
and in OpenOffice Calc with
NORMINV(1-0.05;0;1)
There is a mandatory fixed rate of $ 35 that Raphael will have to pay once the service call has been made. This fixed rate is the constant.
The per hour rate is $20. Suppose the machine took "x" hours to get fixed. Then the variable part of the repair cost will be 
.
Thus, Repair Cost=Fixed Rate Cost+Variable Cost
Or, 
where 
is the total repair cost. Thus, if Raphael ‘s machine took 2 hour to fix, the repair cost is:
dollars.
Therefore, the last option is the correct option.
Answer:
2 minutes
Step-by-step explanation:
Just divide 16 and 8.
Hope this helped you!
Answer:
12
Step-by-step explanation:
3w = w + 8
-w -w
2w = 8
w = 4
4 + 8 = 12
Answer:
3x^2 + xy - 10y^2
Step-by-step explanation:
1. Use the FOIL method
3x
^2 − 5xy + 6yx − 10y
^2
2. Collect like terms
3x
^2
+ (−5xy + 6xy) − 10y^2
3. Simplify
3x
^2
+ xy − 10y^2
