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3 years ago

How many 3 letter codes are possible using a-j without repeats?

1 answer:

5 0

There are 10 letters in the set {a, b, c, d, e, f, g, h, i, j} which is the pool of letters to choose from when making these three letter codes.

We have 10 choices for slot 1
Then 9 choices for slot 2. This is because we can't reuse the choice for slot 1
Then 8 choices for slot 3

Overall, there are 10*9*8 = 90*8 = 720 different permutations

Answer: 720

Note: you can use the nPr permutation formula with n = 10 and r = 3 to get the same answer

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Best answer gets brainliest

tankabanditka [31]

I hope this is helpful.

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3 years ago

Question: Which of the following statements are true about the polynomial

Phoenix [80]

Answer:

for $4x^{4} + 3x^{2} + 6x - 7\\$

#1 is correct- The constant is 7

#2 is correct- The poly is in standard form

#3 is correct- the leading coefficient is 4

#4 is correct- there are 4 terms

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3 years ago

Which expression best represents Maria's age if she is 1 3 of her father's age?

Anna71 [15]

Please paste the answer choices next time....
The expression should include a variable for marias age compared to a variable for her fathers

Something like
M=1/3F

M being maria's age and F being her fathers age

5 0

3 years ago

Read 2 more answers

Jesse needs at least 600 tabs of chlorine for next months pool cleaning routes. He already has 175 chlorine tabs in the warehous

natima [27]

Answer:

about 8

Step-by-step explanation:

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3 years ago

Hank has to drain his pool so repairs can be done on a crack on the bottom. The company coming to fix the pool is scheduled to a

Alik [6]

Answer:

The answer to the question: "Will Hank have the pool drained in time?" is:

Yes, Hank will have the pool drained in time.

Step-by-step explanation:

To identify the time Hank needs to drain the pool, we can begin with the time Hank has from 8:00 AM to 2:00 PM in minutes:

Available time = 6 hours * 60 minutes / 1 hour (we cancel the unit "hour")
Available time = 360 minutes

Now we know Hank has 360 minutes to drain the pool, we're gonna calculate the volume of the pool with the given measurements and the next equation:

Volume of the pool = Deep * Long * Wide
Volume of the pool = 2 m * 10 m * 8 m
Volume of the pool = 160 m^3

Since the drain rate is in gallons, we must convert the obtained volume to gallons too, we must know that:

1 m^3 = 264.172 gal

Now, we use a rule of three:

If:

1 m^3 ⇒ 264.172 gal
160 m^3 ⇒ x

And we calculate:

$x = \frac{160 m^{3}*264.172 gal }{1m^{3} }$ (We cancel the unit "m^3)
x = 42267.52 gal

At last, we must identify how much time take to drain the pool with a volume of 42267.52 gallons if the drain rate is 130 gal/min:

Time to drain the pool = $\frac{42267.52gal}{130\frac{gal}{min} }$ (We cancel the unit "gallon")
Time to drain the pool = 325.1347692 minutes
Time to drain the pool ≅ 326 minutes (I approximate to the next number because I want to assure the pool is drained in that time)

As we know, Hank has 360 minutes to drain the pool and how it would be drained in 326 minutes approximately, we know Hank will have the pool drained in time and will have and additional 34 minutes.

7 0

3 years ago