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3 years ago

10

The time between consecutive uses of a vending machine is exponential with an average of 15 minutes. a)Given that the machine ha

s not been used in the previous 5 minutes, what is the probability that the machine will not be used during the next 10 minutes

1 answer:

Nadusha1986 [10]3 years ago

8 0

Answer5

Step-by-step explanation:

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How did they figure out the answer was 4 for the fraction problem solving. There are 36 people in the Newtown Hiking Club. 2/3 o

inessss [21]

Answer:

Step-by-step explanation:

5 0

3 years ago

An electrician uses 46 3/4 feet of push-back wire from a 200-foot roll. How many feet of wire are left on the roll?

kolbaska11 [484]

Answer:

<u>153 1/4 feet</u>

Step-by-step explanation:

Remaining

200 - 46 3/4
<u>153 1/4 feet</u>

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2 years ago

a coin is tossed and a six-sided die number 1 through 6 is rolled. Find the probability of tossing a head and then rolled a numb

pantera1 [17]

Answer:

since the six sided die is numbered,1 ,2 ,3 ,4 , 5, and 6.

numbers greater than 1 are 5 in number.

so, probability is = 5/6.

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3 years ago

A sample of 15 commuters in Chicago showed the average of the commuting times was 33.2 minutes. If s = 8.3 minutes, find the 95%

OleMash [197]

Answer:

The 95% confidence interval of the true mean.

(29.4261 ,36.9739)

Step-by-step explanation:

<u>Step :- (i)</u>

Given sample size 'n' =15

sample of the mean x⁻ = 33.2

The standard deviation of the sample 'S' = 8.3

<u>95% of confidence intervals</u>

<u></u> $(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$ <u></u>

<u>Step:-(ii)</u>

<u>The degrees of freedom γ=n-1 = 15-1=14</u>

The tabulated value t = 1.761 at 0.05 level of significance.

now substitute all possible values, we get

$(33.2 - 1.761\frac{8.3}{\sqrt{15} } ,33.2+ 1.761\frac{8}{\sqrt{15} } )$

After calculation , we get

(33.2-3.7739 , 33.2+3.7739

(29.4261 ,36.9739)

<u>Conclusion</u>:-

the 95% confidence interval of the true mean.

(29.4261 ,36.9739)

8 0

3 years ago

The variables x and y vary inversely If x=5 when y=12, then find the value of x when y=32

Vilka [71]

Answer:

x=15/8

Step-by-step explanation:

Inverse variation is given by

xy = k

Substituting x=5 and y=12

5*12 = k

60 =k

Our original equation is xy = 60

Now let y=32

x*32 = 60

Divide each side by 32

32x/32 = 60/32

Divide top and bottom by 4

x = 15/8

4 0

3 years ago