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3 years ago

Describe how to solve 3/7n=27 in words

Mathematics

1 answer:

Hunter-Best [27]3 years ago

6 0

Answer:

Step-by-step explanation:

so what you would do in order to solve this equation is do inverse operations. what you do to one side of teh equal sign you have to do to the other. so you divide 3/7n by 3/7 which would isolate n. then you would do teh same thing to the 27. 27/ 3/7= 63

n=63

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The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes. W

aleksandrvk [35]

Answer: d. .2474.

Step-by-step explanation:

Given : The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes.

The cumulative distribution function for exponential distribution is :-

$P(X\leq x)= 1-e^{-\frac{x}{\lambda}}$

, where $\lambda$ = Mean of the distribution.

The probability that the service time is between 2 and 4 minutes will be :

$P(2\leq X \leq 4)=P(X\leq4)-P(X\leq 2)\\\\= (1-e^{\frac{-4}{2.5}})-(1-e^{\frac{-2}{2.5}})\\\\=e^{\frac{-2}{2.5}}-e^{\frac{-4}{2.5}}\\\\=0.449328964117-0.201896517995\\\\=0.247432446123\approx0.2474$

Hence, the correct option is d. .2474.

4 0

3 years ago

a tank is 3/7 full of water.After removing 420 litres it became 12/35 full .how much can the tank hold when full?

insens350 [35]

Answer:

4900 Litres

Step-by-step explanation:

First we need a common demoninator:

3/7=15/35

Then we subtract the two to figure out how much 420 Litres is:

15/35-12/35=3/35

3/35=420 litres

Divide amount by the numerater for thow much 1/x is.

1/35=140

and multiply by the denomenator to get a full number on your fraction, and therefore a full tank.

140 x 35 = 4900

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2 years ago

789091 round to the nearest ten thousands

zmey [24]

790000 is the answer

6 0

4 years ago

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ki77a [65]

It will be 3,9,27,81,243,729

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mart [117]

Answer:

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Step-by-step explanation:

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