Average speed = total distance divided by total time.
In the first part, the car covered 490 km in 7 hours, but I think you mistyped the second part (“then covers a speed of 90km”) and a critical piece is missing to find the total distance and time.
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines and the mean pressure was 5.4 pounds/square inch (psi), the level of significance for the hypothesis test is 0.05. This is further explained below.
<h3>What is the level of significance?</h3>
Generally, the level of significance is simply defined as statistical analysis, the significance level is defined as the likelihood of rejecting the null hypothesis when it is correct.
In conclusion, The average pressure throughout testing on 220 engines was 5.4 psi, and the significance threshold for the hypothesis test was set at 0.05.
Read more about probability
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Answer:
a. -0.01 < x - 8 < 0.01
b. 7.99 < x < 8.01
c. see attachment
d. Bolt has to be greater than 7.99 mm and less than 8.01 mm to be within the margin of error of 0.01 mm.
Step-by-step explanation:
-0.01 < x - 8 < 0.01
-0.01 < x - 8 and x - 8 < 0.01
7.99 < x x < 8.01
Write this as: 7.99 < x < 8.01
On graph the 7.99 and 8.01 are very near to each other and represented via open red circle.
