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miss Akunina [59]
3 years ago
15

Can someone please tell me if these are correct?

Mathematics
2 answers:
Len [333]3 years ago
4 0

There are both correct. Good luck on the test sir.

iragen [17]3 years ago
3 0
Number one is correct and so is two
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A clerk has 4 different letters that need to go in 4 different envelopes. What is the probability that all 4 letters are placed
Burka [1]

1/4 * 1/3 * 1/2 * 1/1 = 1/24 chance that all 4 letters are placed in the correct envelopes.

With the first envelope, there are 4 choices of letters, so the probability of picking the correct letter is 1/4.

With the second envelope, there are 3 remaining letters, so the probability of picking the correct letter is 1/3.

The same logic follows the the third and final letter.

7 0
3 years ago
Whats the answer? Please help..
lukranit [14]
Ap is a line in the picture
6 0
3 years ago
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When a rate is simplifed so that it has a denominator of 1 unit, it is called a(n) ___________ rate.
dangina [55]

Answer:

called unit rate .

Step-by-step explanation:

6 0
3 years ago
Math help please <br><br> Thanks <br> A lot
babunello [35]

Answer:  

2 hours:  3968  <u>[I don't understand the $ sign in the answer box]</u>

At midnight:  12137

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The bacteria are increasing by 15% every hour.  So for every hour we will have what we started with, plus 15% more.  

The "15% more" can be represented mathematically with (1 + 0.15) or 1.15.  Let's call this the "growth factor" and assign it the variable b.  b is (1 +  percent increase).

Since this per hour, in 1 hour we'll have (3000)*(1.15) = 3450

At the end of the second hour we're increased by 15% again:

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Each additional hour add another (1.15) factor,  If we assign a to be the starting population, this can be represented by:

P = a(1.15)^t for this sample that increase 15% per hour.  t is time, in hours.  

If a represents the growth factor, and P is the total population, the general expression is

P = ab^t

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8 0
3 years ago
What is the area of a triangle with a height of 13 cm and a base of a 10 cm?
Alecsey [184]
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\frac{1}{2} (10)(13)


Multiply 10 & 13 to equal 

\frac{1}{2} (130)

Then take half of 130 to get

A = 65 cm^{2}
8 0
3 years ago
Read 2 more answers
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