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3 years ago

6

What is the difference in elevation between a plane flying 14,200 feet above sea level and a submarine traveling 890 feet below

sea level

2 answers:

marissa [1.9K]3 years ago

5 0

maths is gud to us 151617128

viktelen [127]3 years ago

4 0

Answer:

15,090

Step-by-step explanation:

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if the volume for 3d pyramid a is 400cm3 and the volume for 3d pyramid b is 800cm3 ,how many time bigger is the volume of pyrami

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It would just be Pyramid B divided by Pyramid A which is 800/400 which is 2.

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Classify each graph as increasing, decreasing, constant

posledela

Answer:

3. increasing

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Step-by-step explanation:

well for graph 3 the values are increasing

and for graph 4 the values are decreasing

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2 years ago

NEED ANSWER ASAP!!! The function f(x) is shown on the graph.<br> If f(x) = 0, what is x?

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4 years ago

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Solve the equation 2(3x + 7) = -22

maks197457 [2]

<span>2(3x + 7) = -22
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4 years ago

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5. The combined perimeter of a circle and a square is 16. Find the dimensions of the circle and square

Tanya [424]

The dimensions of the circle and square that produce a minimum total area are 1.12 and 2.24 respectively

Represent the side length of the square with s, and the radius of the circle with r.

So, the perimeter (P) and the area (A) of the shape are:

$P =4s + 2\pi r$

$A =s^2 + \pi r^2$

The perimeter is 16. So, we have:

$4s + 2\pi r = 16$

Divide through by 4

$s + 0.5\pi r = 4$

Make s the subject

$s = 4 - 0.5\pi r$

Substitute $s = 4 - 0.5\pi r$ in $A =s^2 + \pi r^2$

$A = (4 - 0.5\pi r )^2 + \pi r^2$

Expand

$A = 16 - 4\pi r + 0.25(\pi r)^2 + \pi r^2$

This gives

$A = 16 - 4\pi r + (0.25\pi^2 + \pi )r^2$

Differentiate with respect to r

$A' = 0 - 4\pi + 2(0.25\pi^2 + \pi )r$

$A' = - 4\pi + 2(0.25\pi^2 + \pi )r$

Set to 0

$- 4\pi + 2(0.25\pi^2 + \pi )r =0$

Add 4pi to both sides

$2(0.25\pi^2 + \pi )r =4\pi$

Divide both sides by 2

$(0.25\pi^2 + \pi )r =2\pi$

Make r the subject

$r =\frac{2\pi}{(0.25\pi^2 + \pi )}\\$

Factor out pi

$r =\frac{2\pi}{\pi(0.25\pi + 1 )}$

Cancel out the common factors

$r =\frac{2}{0.25\pi + 1 }$

Express pi as 3.14

$r =\frac{2}{0.25\times 3.14 + 1 }$

$r =\frac{2}{1.785}$

Divide

$r =1.12$

Recall that:

$s = 4 - 0.5\pi r$

This gives

$s =4 -0.5 \times \pi \times 1.12$

This gives

$s =4 -0.5 \times 3.14 \times 1.12$

$s =2.24$

Hence, the dimensions of the circle and square that produce a minimum total area are 1.12 and 2.24 respectively

Read more about minimum areas at:

brainly.com/question/6427280

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3 years ago