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shtirl [24]
3 years ago
8

how many different two digit numbers can you form using the digits 4,5,1,8, and 2 without repetition?

Mathematics
1 answer:
Rom4ik [11]3 years ago
7 0

Answer:

20

Explanation:

4, 5, 1,8 and 2.

If we count them we have 5 numbers.

Then we want to form two-digit numbers without repetition.

There are 5 numbers possible to occupy the first digit, 4, 5, 1, 8 and 2.

Because it’s without repetition, the number that filled the first digit cannot be the second digit.

So the number possible to occupy second place is 4 different numbers. (5-4)

So there are 5 x 4 = 20 numbers that can we form from those 5 numbers: 4, 5, 1,8 and 2 without repetition.

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A certain radioactive isotope has a half-life of 5 days. If one is to make a table showing the half-life decay of a sample of th
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Amount remaining = 32 / 2^(time in days / 5 days)
<span>
Days</span>
  <span> <span> <span>    Mass </span> <span>
0  32.00 </span> <span>
1  27.86 </span>
<span> 2  24.25 </span> <span>
3  21.11 </span> <span>
4  18.38 </span> <span>
5  16.00 </span> <span>
6  13.93 </span> <span>
7  12.13 </span> <span>
8  10.56 </span> <span>
9  9.19 </span>
<span> 10  8.00 </span> <span>
11  6.96 </span> <span>
12  6.06 </span> <span>
13  5.28 </span> <span>
14  4.59 </span> <span>
15  4.00 </span> <span>
16  3.48 </span>
<span> 17  3.03 </span> <span>
18  2.64 </span> <span>
19  2.30 </span> <span>
20  2.00 </span> <span>
21  1.74 </span> <span>
22  1.52 </span> <span>
23  1.32 </span>
<span> 24  1.15
</span> <span> 25  1.00 </span> </span> </span>

First Column - arithmetic sequence
Second Column - Logarithmic Decay sequence


7 0
3 years ago
Read 2 more answers
What is the missing measure on the small rectangle?
koban [17]

Answer:

4 inches

Step-by-step explanation:

If you divide 18 by 6, the answer is three, so it is scaled down 3x.

So, you have to divide 12 by 3, and the answer is 4.

7 0
3 years ago
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<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B7%7D%20" id="TexFormula1" title=" \sqrt{7} " alt=" \sqrt{7} " align="absmiddle" c
Radda [10]

Answer:  \frac{\sqrt{7}}{7}

========================================================

Explanation:

The reciprocal of x is 1/x where x is nonzero. Multiplying x with 1/x leads to 1. For example, the numbers 9 and 1/9 are multiplicative inverses of each other.

We'll stick 1 over the given square root expression. Then follow these steps to rationalize the denominator.

\frac{1}{\sqrt{7}}\\\\\\\frac{1*\sqrt{7}}{\sqrt{7}*\sqrt{7}}\\\\\\\frac{\sqrt{7}}{(\sqrt{7})^2}\\\\\\\frac{\sqrt{7}}{7}\\\\

In short, \frac{1}{\sqrt{7}}=\frac{\sqrt{7}}{7}

4 0
2 years ago
Joshua's recipe for chili requires 2 3/4 ​ pounds of beef. Sondra's recipe for chili requires 2 2/3 ​ pounds of beef. Which of t
Lemur [1.5K]

Answer:

Step-by-step explanation:

Your question isn't complete but let me help out based on the information given.

Joshua's recipe for chili requires 2 3/4 ​ pounds of beef. Sondra's recipe for chili requires 2 2/3 ​ pounds of beef.

The pounds of beef required by both of them will be:

= 2 3/4 + 2 2/3

= 2 9/12 + 2 8/12

= 4 17/12

= 4 + 1 5/12

= 5 5/12

The difference in the pounds of beef required by both of them will be:

= 2 3/4 - 2 2/3

= 2 9/12 - 2 8/12

= 1/12

Also, we.can also infer that Joshua recipe for chili requires more pounds of beef than that of Sondra

4 0
3 years ago
Find the LCM for 6 and 8
bogdanovich [222]

Answer:

24

Step-by-step explanation:

The LCM of 6 and 8 is 24 because 24 is the smallest number that is both a multiple of 6 and a multiple of 8

7 0
3 years ago
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