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hodyreva [135]
3 years ago
15

The mean checkout time in the express lane of a large grocery store is 2.7 minutes, and the standard deviation is 0.6 minutes. T

he distribution of checkout times is non-normal (for one thing, it can be a lot longer than 2.7 minutes, but it can only be so short). (a) What is the probability that a randomly-selected customer will take less than 3 minutes?

Mathematics
1 answer:
Gennadij [26K]3 years ago
3 0

Answer:

0.6915

Step-by-step explanation:

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Given f(x) = -x - 3, find f(-6)
sweet-ann [11.9K]

Answer:

plug in -6

-(-6) - 3

the 6 turns into a positive

subtract 3 from 6

= 3

3 0
3 years ago
What is the mode of the following numbers?<br> 3,7, 5, 2, 5, 5, 2,5
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8 0
2 years ago
Read 2 more answers
Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (–
neonofarm [45]

The answer would be (-3+18) + (i +5i)


This is because changing the order of the numbers does not change the sum

6 0
3 years ago
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Which of the following is true of the data set represented by the box plot max at 35
Bezzdna [24]

Though the box plot is not given, the truth about the data set represented by the box plot is <u>removing</u> the outliers would not affect the median.

<h3>What is a box plot?</h3>

A box plot gives a graphical (rectangular) representation of statistical data based on the following five values: minimum, first quartile, median, third quartile, and maximum.

Essentially, a box plot has the following five data descriptions:

  • The leftmost whisker, showing the minimum value.
  • The rightmost whisker, showing the maximum value.
  • The leftmost line, showing the first quartile.
  • The middle line, showing the median or the second quartile.
  • The last line shows the third quartile.

Thus, the truth about the data set represented by the box plot is <u>removing</u> the outliers would not affect the median.

Learn more about the box plot at brainly.com/question/14277132

3 0
2 years ago
A certain positive integer has exactly 20 positive divisors. What is the smallest number of primes that could divide the integer
Alika [10]

As per my explanation to (b) above, the largest number of primes that could factor such a number is 4.

Note that  2,3,5 and 7   are the smallest primes, then use the reasoning from

(b) above. we are looking for four exponents, that, when 1 is added to each and all are multiplied together, would equal 20.

But no such integers  k, l, m, and n  exist such that (k + 1)(l + 1)(m + 1) (n + 1)  = 20 where k, l,m, and n ≥ 1 so this number, whatever it is, can't have 4 prime factors

Let's drop 7 out of the mix and suppose it has just 3 prime factors 2, 3, and 5 again we are looking for three exponents,  that, when 1 is added to each and all are multiplied together, would equal 20.  Put another way, we are looking for k, l and m ≥ 1   such that (k + 1)(l + 1)(m + 1) = 20

Note that the  only possibility here  is when we have 2 *2 *5  = 20 and the smallest possible product would be 2^(4 )* 3^(1) * 5^(1) =  2^4 * 3 * 5 = 240

Now......the only remaining possibility is  that this number is composed of the two smallest primes, 2 and 3,  and we are looking for  some k  and l ≥ 1 such that (k + 1)(l + 1) = 20 clearly, the only possibilities  are when k = 4 and l = 5, or vice-versa

So this number would factor as either 2^3 * 3^4   = 648  or 2^4 * 3^3 = 432 and both are > 240.

Learn more about positive integers at

brainly.com/question/1367050

#SPJ4

8 0
1 year ago
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