Find the first forth and tenth terms of the arithmetic sequence described by the given ruleA(n)=-6+(n-1)(1/5)
2 answers:
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Answer:
0.5 represent the original 100% but we want to obtain a 75% aditional so we can find for the value x if interest and we got:
So we need to sell the fries ar 0.875$ if we want to obtain a 75% of margin
Step-by-step explanation:
For this case we know that the french fries cost $0.50 and we want to have a margin of 75% on the fries. So we can use the following proportional rule:
0.5 represent the original 100% but we want to obtain a 75% aditional so we can find for the value x if interest and we got:
So we need to sell the fries ar 0.875$ if we want to obtain a 75% of margin
The approximate value of P(-0.78 ≤ Z ≤ 1.16) is obtained being 0.6593
<h3>How to get the z scores?</h3>If we've got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z score.
If we have
(X is following normal distribution with mean and standard deviation
)
then it can be converted to standard normal distribution as
(Know the fact that in continuous distribution, probability of a single point is 0, so we can write
Also, know that if we look for Z = z in z-tables, the p-value we get is
For this case, we have to find:
It can be rewritten as:
The p-values for Z = 1.16 and Z = -0.78 from the z-table is found as 0.8770 and 0.2177 respectively, and therefore, we get:
Thus, the approximate value of P(-0.78 ≤ Z ≤ 1.16) is obtained being 0.6593
Learn more about z-score here: