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umka21 [38]
2 years ago
12

PLZ NEED THIS TODAY BY 5PM WILL GIVE BRAINLEST IF CORRECT 100 POINTS

Mathematics
2 answers:
asambeis [7]2 years ago
8 0

Answer:

<u>Question # 1:</u>

<u>a)</u>

A number is no more than 21 means that it is less than 21 or equal to it. Using n as the variable.

So,

It will be:

n ≤ 21

Where "≤" is used for "less than or equal to".

<u>b)</u>

A number is at least 5 means that it can be 5 or a number greater than 5.

So, We'll use "≥" for "greater than or equal to"

n ≥ 5

<u>c)</u>

For more than, we will use ">"

So,

n > 3/5

<u>Question # 2:</u>

<u>d)</u>

Here, it is shown that n is either 14 or any number less than 14.

So, we'll use "≤" for "less than or equal to"

n ≤ 14

<u>e)</u>

Here, it is shown on the number line than n is any number which is either 14 or any number greater than it.

So,  we'll use "≥" for greater than or equal to.

n ≥ 14

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>

Tcecarenko [31]2 years ago
6 0

Answer:

Step-by-step explanation:

1.

(a) n ≤ 21

(b) n ≥ 5

(c) n > 3/5

2.

(d) n < 14

(e) n ≥ 14

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A rectangular box with a square base and a cover is to be built to contain 640 cubic feet. If the cost per square foot for the b
mixer [17]

Answer:

  $4800

Step-by-step explanation:

The cost is minimized when any pair of opposite faces of the box costs the same as any other pair. Since the top+bottom total $25 per square foot and the sides (left+right or front+back) total $20 per square foot, the area of a side must be 25/20 = 5/4 times the area of the top or bottom.

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_____

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Algebraically, you can set the derivative to zero to find the value of x.

  dc/dx = 0 = 50x -25600/x²

  512 = x³ . . . . multiply by x²/50 and add 512

  8 = x . . . . . . . take the square root. Same solution as above. <em>Cost is minimized when the side length of the base is 8 ft</em>.

8 0
3 years ago
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Answer:

I'm not sure what you are asking for?

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But, again, I'm not sure what you want.

6 0
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8 0
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Step-by-step explanation:

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