Answer:

<h3>x≤4000 is the right answer.</h3>
Answer:
The speed of the car is 250. The error the student made is they didn't look at the hours.
Step-by-step explanation:
Your work appears to be correct.
The results from a graphing calculator are in agreement.
For a 95% confidence interval, the corresponding z-score is 1.96. Therefore the deviation will by 1.96*0.5 lbs = 0.98 lbs. Therefore, the confidence interval will be (5 - 0.98, 5 + 0.98), which is (4.02, 5.98). The weight range is from 4.02 lbs to 5.98 lbs.