The answer is 9.857. This can be rounded.
Answer:
the answer is the 2nd one
Step-by-step explanation:
Answer:
A company produces electric insulators. The strength of the insulators is important since a broken insulator may cause a short circuit. Unfortunately, the strength varies significantly due to the material. Because of the expense, only a limited number of insulators could be tested. The engineers sampled 25 insulators (From a production run of 200), and conducted a destructive test to determine the force that was required to break the insulators. The mean value of this force was 1723 lbf with a sample standard deviation of 90 lbf. You may approximate the population standard deviation with the sample standard deviation for the following questions. a. Determine if the population is large enough or if a finite population correction (FPC) factor is needed. If so, what is the FPC factor? b. For 95% confidence, determine the margin of error (+ lbf) c. For these conditions, estimate the range of the probable population mean. Provide lower and upper values. For 95% confidence, determine the margin of error ( Assume the same mean and sample standard deviation. What is one advantage and one disadvantage of using 50 insulators instead of 25 insulators? d. lbf) if 50 insulators were tested.
Step-by-step explanation:
Your answer is y = -1/2 and y = 2
To solve this quadratic we first need to subtract 2 from both sides to set it equal to 0, which gives us 2y² - 3y - 2 = 0
Then we just need to factorise it:
2y² - 3y - 2 = 0
(2y + 1)(y - 2) = 0
Now we can set each bracket equal to 0 and solve for y:
2y + 1 = 0
2y = -1
y = -1/2
y - 2 = 0
y = 2
I hope this helps! Let me know if you have any questions :)
Answer:
z=12x2
30x-24
x=y=30
z=12x2
Step-by-step explanation:
