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PolarNik [594]
3 years ago
6

The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of 4 minutes and a stand

ard deviation of 3 minutes.
Sixty percent of the time, it takes more than how many minutes to find a parking space?
Mathematics
1 answer:
DedPeter [7]3 years ago
6 0

Answer:

3.24 minutes

Step-by-step explanation:

Use a calculator or chart to find the z-score.

P(Z > z) = 0.60

P(Z < z) = 0.40

z = -0.253

Find the time associated with the z-score.

z = (x − μ) / σ

-0.253 = (x − 4) / 3

x = 3.24

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Which expression is equivalent to 14x − 7 + 3(2x − 5)?
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Answer:

This equation is equivalent to 20x-22

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If 3(x+2)-2(x+1)=8 the value of x is
andrey2020 [161]
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7 0
4 years ago
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Scott delivers 14 newspapers in 10min. This is 28% of his round. A) How many more papers does Scott need to deliver? b) Scott co
Leya [2.2K]

Answer:

A)36

B)50 minutes 40 second

Step-by-step explanation:

<h3>Question-A:</h3>

according to the question

\begin{array}{ccc}28\%  \:  \: \text{newspaper} \implies 14  \\ 100\%  \:  \: \text{newspaper} \implies  \displaystyle  \frac{14 }{28\%}\\ \rm since \: \% =  \dfrac{1}{100}   \: we \: get : \\  \\  \displaystyle \xrightarrow{ } \frac{14}{ \dfrac{28}{100} }  \\   \\ \xrightarrow{ \rm \: simplify \:  complex \:  fraction} \displaystyle \: 14 \times  \frac{100}{28} \\  \xrightarrow{simplify} 50 \end{array}

since he had already delivered 14 newspaper he needs to deliver

\displaystyle 50 - 14

simplify Substraction:

\displaystyle36

<h3>Question-B:</h3>

remember that,

\displaystyle  \text{rate} =  \frac{ \rm \: amount}{ \rm time}

given that,

  • amount:14
  • time:10

thus substitute:

\displaystyle  \text{rate} =  \frac{ \rm 7}{ \rm5}

so,

\displaystyle \frac{ \rm 7}{ \rm5}  \times 36

simplify:

\displaystyle 50.4

hence,

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3 years ago
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