Answer:
The first option is not a function
Explanation:
A function is where there is no repeated x values
Just a reminder
Answer:
1.307%
4.38%
5.696%
Step-by-step explanation:
300567672468.78-200.67=
300567672268.11005
Answer:
(48.3875, 51.6125)
Step-by-step explanation:
At 99% level of significance


From the normal standard deviation table 
Considering that
±
=50±
50±2.33(0.625)=50±1.6125=(48.3875, 51.6125)
Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125
Answer:
4 hours
Step-by-step explanation:
First we need to subtract the one pay fee (the helmet rental fee, $15)
So 51 - 15 = 36
Then we need to divide 36 by the amount of money it costs for each hours to find how many hours he rented the bike
So 39/9 = 4