Answer:
Step-by-step explanation:
It's not that clear on my screen
Sphere Surface Area = <span> 4 • <span>π <span>• r²
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Sphere Surface Area =
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<span>
1,809.5573684677
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</span>
Answer: $ 67.03
Step-by-step explanation:
Given : The average expenditure in a sample survey of 50 male consumers was $135.67, and the average expenditure in a sample survey of 38 female consumers was $68.64.
i.e. 
The best point estimate of the difference between the two population means is given by :-

Hence, the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females : $ 67.03