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dmitriy555 [2]
3 years ago
14

The average annual out-of-pocket costs for an implant for Americans last year is estimated to be $2,488. Assume that this cost f

ollows the normal distribution with a standard deviation of $250. What is the probability that a randomly selected American who has dental insurance will spend between $2,400 and $2,900 for an implant

Mathematics
1 answer:
Alenkinab [10]3 years ago
6 0

Answer:

58.73%

Step-by-step explanation:

What we must do is calculate the z value for each value and thus find what percentage each represents and the subtraction would be the percentage between those two values.

We have that z is equal to:

z = (x - m) / (sd)

x is the value to evaluate, m the mean, sd the standard deviation

So for 2400 we have:

z = (2400 - 2488) / (250)

z = -0.35

and this value represents 0.3632

for 89 we have:

z = (2900 - 2488) / (250)

z = 1.65

and this value represents 0.9505

we subtract:

0.9505 - 0.3632 = 0.5873

Therefore the probability would be 58.73%

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Answer:

M=-10

Step-by-step explanation:

To find the sope we use y-y1/x-x1. For this problem, I chose the first two coordinates.

(-33.5)-(-55.6)/1.20-3.45=22.6/-2.25=-10(rounded)

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2 years ago
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tia_tia [17]
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2 years ago
Solve using proportions.
denis23 [38]

Answer:

7.8 = k

Step-by-step explanation:

Since the figures are similar, we can use proportions

c           k

----- = -------

b            j

Substituting the values in

6.5         k

----- = -------

4          4.8

Using cross products

6.5 * 4.8 = 4k

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Divide each side by 4

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2 years ago
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5 0
2 years ago
Read 2 more answers
HELP ME PLEASE I DONT UNDERSTAND THIS !!!
ioda

The car is speeding at a rate of 33.3mph

<h3>Speed and distance of an object</h3>

If a certain car going 60 mph can stop in 180 ft, then we can express this as:

  • 60mph = 180ft

To determine the speed for a car traveling at 100ft, we will have:

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Take the ratio of the expression

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x = 33.3mph

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learn more on speed here: brainly.com/question/4931057

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