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.
The path of the ball is an illustration of absolute equation.
The equation of the path is: 
The given parameters are:
--- the vertex (i.e. the point where the ball hits the wall)


An absolute function is represented as:

Substitute 

Substitute
for x and y


Remove absolute bracket

Collect like terms


Solve for a

Simplify

Substitute
in 

Hence, the equation of the path is: 
See attachment for graph that models the path
Read more about absolute equations at:
brainly.com/question/2166748
Answer:
D
Step-by-step explanation:
no reason for the question to include his age
Answer:
0.222
Step-by-step explanation: