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Vika [28.1K]
3 years ago
14

Suppose that, after measuring the duration of many telephone calls, a telephone company found their data was well-approximated b

y the density function p(x)=0.8????−0.8x, where x is the duration of a call, in minutes. (a) What percentage of calls last between 1 and 2 minutes? Percent = 100(-e^(-1.6) + e^(-0.8)) percent (b) What percentage of calls last 1 minutes or less? Percent = 100(1-e^(-0.8)) percent (c) What percentage of calls last 4 minutes or more? Percent = 100(e^(-3.2)) percent (d) What is the cumulative distribution function, P(????)?
Mathematics
1 answer:
Temka [501]3 years ago
5 0
856755556666667811111118999.56
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Given the inequality below:<br><br> 3x-y&gt;4<br><br> Which is the graph of the solution set?
OLga [1]

Answer:

A shaded region below a dashed line (y <3x-4)

Step-by-step explanation:

For linear inequalities, we have shaded regions below or above a dashed or solid or continuous line represented by an inequality.

Their graphs are called region graphs. Those regions are only enclosed ones if before the sign of inequality it is included both variables. Like x²+y²<1, |x+y|<1, etc.

In this case what we have here is an open region, as the graph below shows.

3x-y>4 =-y>4-3x∴y<3x-4

Setting a value for x

3x-4=0

3x=4

3x/3=4/3

x=4/3 (slope)

(4/3,0)

6 0
3 years ago
Heights of male students in the eighth grade are normally distributed with a mean of 57.2 in. and standard deviation of 2.4 in.
romanna [79]
<span>In statistics finding percentiles relates to the standard deviation and something called a z-score. For normally distributed data the z-score represents how many standard deviations above or below the mean that group is a part of. The z-score for normally distributed data for the 90th percentile is 1.28. The standard deviation is then multiplied by the z-score to find, in this case, the shotlrtest height needed to be in the 90th percentile of this population. In this case to be in the 90th percentile your height must be 60.27 inches.</span>
3 0
3 years ago
DUE TODAY, LAST QUESTION FOR THE DAY POG!!! PLEASE ANSWER ALL OF THEM IM ALMOST DONE WITH MY TEST! GIVING BRAINLIEST, MILK, COOK
postnew [5]
1 25.5
2 making two assumptions that the two triangle are identical and the figure on the left is a square then I’d say 57 but that not there so you might want to email your teacher.
3 35
5 0
2 years ago
Which of the following is the best strategy to support children in learning about shapes?
Sunny_sXe [5.5K]

The best option is C. Provide multiple worksheets with pictures of the basic shapes for children to colour.

<h3>What does the learning process in children involve?</h3>

The process of learning has often been described to include all but not limited to the following:

  • gaining new understanding,
  • learning new behaviours,
  • skills,
  • values, attitudes, and
  • preferences.

Children according to experts learn faster and easily remember what they see. Hence, providing multiple worksheets with pictures of the basic shapes for children to colour is the most cost-efficient strategy to support children in learning about shapes.

You can learn more from a related question about teaching strategies to use for children here brainly.com/question/240537

#SPJ1

4 0
2 years ago
It takes Ryan 1/5 hour to bike home from school. his biking speed is 10 mph
Anika [276]
1/50? I can’t be sure....

Ok, so.. first you write both the problems down and write the 10 as a fraction (so it would automatically be 10/1). Then invert so it would be a multiplication problem (1/5 x 1/10). Since you can’t cross cancel, you multiply across. So, 1/5 x 1/10 (1 x 1 and 10 x 5)
1/50
5 0
2 years ago
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