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rusak2 [61]
2 years ago
8

Please help me!!! I don't know! txcfygvubhjnlkm

Mathematics
1 answer:
topjm [15]2 years ago
7 0

Answer:

See explanation

Step-by-step explanation:

look photo

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Find the dimensions of the rectangle with area 256 square inches that has minimum perimeter, and then find the minimum perimeter
mezya [45]

Answer:

Dimensions: A=a\cdot b=256

Perimiter: P=2a+2b

Minimum perimeter: [16,16]

Step-by-step explanation:

This is a problem of optimization with constraints.

We can define the rectangle with two sides of size "a" and two sides of size "b".

The area of the rectangle can be defined then as:

A=a\cdot b=256

This is the constraint.

To simplify and as we have only one constraint and two variables, we can express a in function of b as:

b=\frac{256}{a}

The function we want to optimize is the diameter.

We can express the diameter as:

P=2a+2b=2a+2*\frac{256}{a}

To optimize we can derive the function and equal to zero.

dP/da=2+2\cdot (-1)\cdot\frac{256}{a^2}=0\\\\\frac{512}{a^2}=2\\\\a=\sqrt{512/2}= \sqrt {256} =16\\\\b=256/a=256/16=16

The minimum perimiter happens when both sides are of size 16 (a square).

4 0
3 years ago
Which numbers are 4 units from -2 on this number line?
Nady [450]

Answer:

-6 and 2

Step-by-step explanation:

See attached worksheet.

6 0
2 years ago
2nd Question.... Will mark brainiest
stiks02 [169]

Answer:

c

Step-by-step explanation:

40x3.14=125.6

8 0
3 years ago
Read 2 more answers
The sum of two numbers is 50 and the difference is 4
juin [17]

Step-by-step explanation:

let the 2 numbers be x and x + 4 as their deference is 4.

their sum = 50

now,

→ x + x + 4 = 50

→ 2x + 4 = 50

→ 2x = 50 - 4 = 46

→ x = 46/2 = 23

therefore two numbers are,

x = 23

x + 4 = 23 + 4 = 27

hope this answer helps you dear...take care and may u have a great day ahead!

3 0
2 years ago
Read 2 more answers
620 + 107 round estimate the sum
Westkost [7]
Okay. 

 620 would be rounded estimate to 600

& 

107 would be rounded estimate to 100 


6 0
3 years ago
Read 2 more answers
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