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zvonat [6]
2 years ago
8

1. My number has two digits.

Mathematics
2 answers:
lana [24]2 years ago
7 0

\implies {\blue {\boxed {\boxed {\purple {\sf {Your\:answer\:is\:59.}}}}}}

\sf \bf {\boxed {\mathbb {Step-by-step\:explanation:}}}

1. My number has two digits.

  • 59 is a two-digit number. ✔

2. Double my number is less than 150.

  • Double of 59 is 118, which is less than 150. ✔

3. I am not divisible by 12.

  • Since 59 is an odd number, hence it is not divisible by 12. ✔

4. My digits are different from each other.

  • The digits 5 and 9 are different. ✔

5. The second digit in my number is divisible by an odd number.

  • 9 is divisible by an odd number, i.e. 3. ✔

6. My first digit is less than my second digit.

  • 5 is less than 9. ✔

7. My digits add up to 14.

  • 5 + 9 gives us 14. ✔

Therefore, the required number is \sf\pink{59}.

\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}

Luden [163]2 years ago
7 0

Answer:

59

Step-by-step explanation:

two digits, 59=118, unable to divide by twelve since its an odd number, 9÷3=3, 5<9, 5+9=14

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width = 46
length = 46 + 9 = 55

55 x 46 = 2530

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An open box with a square base is to have a volume of 4000in3. Find the length of the side of the square base that would result
Elina [12.6K]

Answer:

I did this quickly and don't have the time to check.  Please review carefully.

Length of the side of a square base to provide a volume of 4000 in^3 with the minimum material to construct the entire box. is 6 in.  The dimensions for this box would be (6 in) by (6 in) by 111.1 in.

Step-by-step explanation:

The volume of a square box is given by

Volume(V) = L*W*H,

where L is length, W is width, and H is height.

Since the base is square, W = L, so we can rewrite the volume equation as:

V = L*W*H

V = L*L*H

Volume = L^2H

The area of the box surface is the sum of all the sides:

Top and Bottom:    2*(L*W), or 2 (W^2)

2 Sides:                  2*(W*H), or 2(W^2)

2 other sides:        2*(L*H)  

The total surface area is

  Area = 2*(L*W) + 2*(W*H) +  2*(L*H)

Since W=L, we can rewrite this equation as:

  Area = 2*(L*L) + 2*(L*H) +  2*(L*H)

<u>Total Surface Area = 2L^2 + 4LH</u>

The target volume is 4000 in^3

We know that Volume = L^2H from above.

4000 in^3 = L^2H

we can rewrite this as:

H = 4000/L^2

Substitute this value of H into <u>Total Surface Area = 2L^2 + 4LH</u>

Total Surface Area = 2L^2 + 4L(4000/L^2)

Total Surface Area = 2L^2 + (1000/L)

We want to minimize total surface are, so we can either plot this function and look for the minimum, or we can take the first derivative and set it equal to zero (the first derivative tells us the slope of the line at any point.  We want the point where the slope is zero, where it changes direction).  I will plot the function.

<u>Plot: </u> See attached graph.

I set the above equation to the format:  y = 2x^2 + (1000/x), where y is the total surface area and x is the box length.

I see a minimum at (6.2,230).  This corresponds to a box length of 6.2 in and a surface area of 230 in^2.

7 0
2 years ago
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loris [4]
-2005.95. I googled it. May want to double-check though, and if you get something differentx let me know.
5 0
3 years ago
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