I think it’s b leetttttt ggggggooo
<h2>
Answer with explanation:</h2>
Let
be the population mean.
By observing the given information, we have :-

Since the alternative hypotheses is left tailed so the test is a right-tailed test.
We assume that the time spend by students per day is normally distributed.
Given : Sample size : n=121 , since n>30 so we use z-test.
Sample mean : 
Standard deviation : 
Test statistic for population mean :-


Critical value (one-tailed) corresponds to the given significance level :-

Since the observed value of z (-7.79) is less than the critical value (1.2816) , so we do not reject the null hypothesis.
Hence, we conclude that we have enough evidence to accept that the college students spend an average of 4 hours or less studying per day.
Answer:
11.1%
Step-by-step explanation:
The percentage change in a value can be computed from ...
%change = ((new value)/(old value) -1) × 100%
= ((8500/9559) -1) × 100%
= (0.8892 -1) × 100%
= -11.08%
The value of the car decreased about 11.1% in the first year.