Answer:
20 gallons per 180 miles
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
n=3s
~~~~~~~~~~~~~~~~~
Answer:
115.2 in²
Step-by-step explanation:
Area of two triangles =
4 x 3 = 12
Area top rectangle/parallelogram =
5 x 8.6 = 43
Area back rectangle =
3 x 8.6 = 25.8
Area bottom rectangle =
4 x 8.6 = 34.4
Total = Sum of all areas
115.2 in²
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Answer: We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.
Step-by-step explanation:
Given : Significance level :
Sample size : n= 52 , which is a large sample (n>30), so we use z-test.
By using z-value table,
Critical value:
Sample mean :
Standard deviation :
The confidence interval for population means is given by :-
i.e.
Now, the 95% confidence interval for the ppopulation mean = . (29.0813, 40.0187)
Hence, We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.
Answer:
645.333 feet per second
Step-by-step explanation: