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3 years ago

Any help I can get on this please? I really don't know how to do it

Mathematics

1 answer:

dem82 [27]3 years ago

4 0

I can't really see the probably, sorry.

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An automatic car wash takes exactly 5 minutes to wash a car. On average, 10 cars per hour arrive at the car wash. Suppose that,

77julia77 [94]

Answer:

0.9595724

Step-by-step explanation:

Time taken to wash a car (μ) = 5 minutes

Hence, Number of cars washed per hour = 60/5 = 12 cars

If 5 cars arrive, 30 minutes to closing ; it takes 25 minutes to finish up ;

If 1 more car arrives, then it takes exactly 30 minutes

Hence, there will be no one in line at closing ;

IF 0 or 1 car arrives, if more than 1 car arrives, then there will be people in line at closing.

Hence, probability of waiting in line at closing :

1 - [p(0) + p(1)]

Using poisson :

P(x) = [(e^-μ) * (μ^x)] / x!

If x = 0

P(0) = [(e^-5) * (5^0)] / 0!

P(0) = (0.0067379 * 1) / 1

P(0) = 0.0067379

X = 1

P(1) = [(e^-5) * (5^1)] / 1!

P(0) = (0.0067379 * 5) / 1

P(0) = 0.0336897

Hence,

1 - (0.0067379 + 0.0336897)

1 - 0.0404276

= 0.9595724

Hence, the probability that anyone would be in the car washing line after closing is 0.9595724

4 0

3 years ago

Find the surface area of the solid shown or described. If necessary, round to the nearest tenth. 348m^2 484m^2 180.7m^2 262m^2

Inessa05 [86]

Answer: 520.5 m²

This answer is not an answer choice provided, but I hope this still helps.

Step-by-step explanation:

The formula to find the surface area of a cone is $A=\pi r(r+\sqrt{h^2+r^2} )$ . Looking at the formula, we can see there are radius and height. The figure provided gives the radius is 7.1 m and height of 14.6 m. Since we have these values, we can just plug them into the formula.

$A=\pi (7.1)(7.1+\sqrt{14.6^2+7.1^2} )$

Now that we have filled out the formula, we can plug this into a calculator to get the surface area. It is possible to do this by hand, but it is hard to be accurate.

$A=520.5m^2$

3 0

3 years ago

Mary has 23 marbles 7/23 of the marbles are yellow and 13/23 of the marbles are blue the rest of the marbles are green how many

deff fn [24]

Answer:

The answer here is 3.

Step-by-step explanation:

Since 7 of the marbles are yellow and 13 of them are green, you would first add these numbers together to find the number of marbles that are not green. After doing this you will find that 20 of the marbles aren't green. Since there are 23 marbles, and 20 of them aren't green, you would subtract these two numbers to find that the number of green marbles is three.

8 0

3 years ago

Is 5 3/8 greater than 5 4/10

Lostsunrise [7]

Answer:

False

Step-by-step explanation:

5 3/8 > 5 4/10

4 0

3 years ago

If point Q does not lie on the x-axis or the y-

natta225 [31]

Answer:

E. II or IV only

hope it helps :)

mark brainliest!!

5 0

2 years ago