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3 years ago

Plz, Help me with this question.

Mathematics

2 answers:

AURORKA [14]3 years ago

7 0

Answer:

x+7 i think

Step-by-step explanation:

Finger [1]3 years ago

5 0

Answer:

Hello :D

Step-by-step explanation:

You might be interested in

Suppose the radius of the sphere is increasing at a constant rate of 0.3 centimeters per second. At the moment when the radius i

elixir [45]

<h2>At the moment when the radius is 24 centimeters, the volume is increasing at a rate of 2171.47 cm³/min.</h2>

Step-by-step explanation:

We have equation for volume of a sphere

$V=\frac{4}{3}\pi r^3$

where r is the radius

Differentiating with respect to time,

$\frac{dV}{dt}=\frac{d}{dt}\left (\frac{4}{3}\pi r^3 \right )\\\\\frac{dV}{dt}=\frac{4}{3}\pi \times 3r^2\times \frac{dr}{dt}\\\\\frac{dV}{dt}=4\pi r^2\times \frac{dr}{dt}$

Given that

Radius, r = 24 cm

$\frac{dr}{dt}=0.3cm/s$

Substituting

$\frac{dV}{dt}=4\pi r^2\times \frac{dr}{dt}\\\\\frac{dV}{dt}=4\pi \times 24^2\times 0.3\\\\\frac{dV}{dt}=2171.47cm^3/min$

At the moment when the radius is 24 centimeters, the volume is increasing at a rate of 2171.47 cm³/min.

4 0

3 years ago

The circumference of a circle is 40 m. Find its area?

earnstyle [38]

If the circumference of a circle is 40 m, its area is 127.32395447352 m².

5 0

3 years ago

What is the median of the data represented in the line plot?

nevsk [136]

Answer:

The answer is Choice D

Step-by-step explanation

The median is the middle value in the given set of data.

If the data is even, then there will be two middle numbers, then the median is the average of these two middle numbers.

Thus, from the data, it is obvious that the number of data in the given set is 13.

Hence, the middle number is 23.

Therefore, the median of the data is 23.

6 0

3 years ago

X+2>7 write the solution set in interval notation

REY [17]

Answer:

(5, infinitysymbol)

Step-by-step explanation:

First solve the inequality. Subtract 2 from both sides.

x + 2 > 7

x > 5

So that is one way of writing the answer and it is hopefully kind of understandable. X>5 means all the numbers greater (bigger) than 5, forever to infinity.

Interval notation is a way of writing a set or group of numbers. Interval notation uses ( ) parenthesis or [ ] square brackets. Then two numbers go inside with a comma in between. The first number is where the set of numbers start and the second number is where the set ends. You always put parenthesis around the infinity symbol or negative infinity symbol. You only use a square bracket if the inequality symbols have the "or equal to" underline under the > or <.

So x > 5 in interval notation is:

(5, infinitysymbol)

This shows that 5 is not included in the solution; and all the numbers forever bigger than five are solutions as well.

5 0

2 years ago

The measure of an exterior angle of a regular polygon is 72°. How can you find the measure of an interior angle of the polygon?

madam [21]

Answer:

Option C) Subtract 72° from 180°

Step-by-step explanation:

We are given the following in the question:

Measure of exterior angle = 72°

Properties of exterior angles:

An exterior angle of a polygon is an angle at a vertex of the polygon but outside the polygon.
It is formed by one side and the extension of an adjacent side.
The interior and exterior angles are supplementary.
Thus, the sum of the interior angle and the exterior angle is 180 degrees.
All the exterior angles of a regular polygon are equal in measure.

Thus, we can write:

Let x degrees be the measure of the interior angle. Thus, we can write:

$x + 72 = 180\\x = 180-72 = 108^\circ$

The measure of the interior angle is 108 degrees.

Thus, the correct answer is:

Option C) Subtract 72° from 180°

4 0

3 years ago