Which function in vertex form is equivalent to f(x) = 4 + x2 – 2x?
1 answer:
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For this case we are told that 60% of a number "x" is 22. Then, to find the number we make a rule of three:
x --------------> 100%
22 ------------> 60%
Now, we find 45% of the number "x" found:
36.67 --------> 100%
y ---------------> 45%
Where "y" represents the number that is 45% of x.
So, 15.50 is 45% of x
Answer:
16.50 is 45% of x
Answer:
1.28
Step-by-step explanation:
Given that a sample of 1500 computer chips revealed that 55% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 53% of the chips do not fail in the first 1000 hours of their use.
(Two tailed test for testing sample proportion with population proportion)
Std error of proportion assuming p = 0.53 is
p difference = 0.02
Z= test statistic = p diff/std error = 1.2775~1.28