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4 years ago

300 x 1/2 PLEASE HELP

Mathematics

1 answer:

Dmitriy789 [7]4 years ago

6 0

Answer:

150

Step-by-step explanation:

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Show three ways to<br> quarter a circle.<br> OOO

Sidana [21]

Answer:

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Step-by-step explanation:

4 0

3 years ago

When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is...

enot [183]

Answer:

c. $\frac{1}{\pi}$

Step-by-step explanation:

We have been given that the area in square units of an expanding circle is increasing twice as fast as its radius in linear units

We will use derivatives to solve our given problem.

We know that area (A) of a circle is equal to $A=\pi r^2$ .

Let us find derivative of area function with respect to time.

$\frac{dA}{dt}=\frac{d}{dt}(\pi r^2)$

Bring out constant:

$\frac{dA}{dt}=\pi \frac{d}{dt}(r^2)$

Using power rule and chain rule, we will get:

$\frac{dA}{dt}=\pi(2r)* \frac{dr}{dt}$

$\frac{dA}{dt}=2\pi r*\frac{dr}{dt}$ Here $\frac{dr}{dt}$ represents change is radius with respect to time.

We have been given that area of an expanding circle is increasing twice as fast as its radius in linear units. We can represent this information in an equation as:

$\frac{dA}{dt}=2\frac{dr}{dt}$

$2\pi r* \frac{dr}{dt}=2\frac{dr}{dt}$

$2\pi r=2$

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

$r=\frac{1}{\pi}$

Therefore, the radius is $\frac{1}{\pi}$ and option 'c' is the correct choice.

6 0

3 years ago

Help pleseeeeeeeeeeeeeeeeeeeeee

Triss [41]

Answer:

The answer is

B: 10 cups

7 0

4 years ago

Which of the following is the product of the rational expressions shown below?

Molodets [167]

Answer:

Step-by-step explanation:

6/x* 5/(2x+1) = 30/ 2x^2+x

6 0

3 years ago

Marie has a small copy of rene magritte's famous painting, the schoolmaster. Her copy has dimensions 2 inches by 1.5 inches. The

Andrej [43]

We just multiply the scale to the dimensions
2 in to original is: 2×40= 80 cm
or do proportions:
$\frac{2}{x}$ = $\frac{1}{40}$
= $\frac{2*40}{1}$ =x
=80 cm=x the original dimension.
Same thing to the other side.
1.5×40=60 cm
or proportions again:
$\frac{1.5}{y}$ = $\frac{1}{40}$
$\frac{1.5*40}{1}$ =y
60 cm=y
60 cm is the original dimension
80 cm times 60 cm ORIGINAL DIMENSION

4 0

3 years ago