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4 years ago

What is 87,200,000 written in scientific notation?

Mathematics

2 answers:

Elan Coil [88]4 years ago

3 0

Answer:

8.72 • 10^7

Step-by-step explanation:

jasenka [17]4 years ago

3 0

87,200,000 in scientific notation is 8.72x10^7
Hope that helps :D

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A lab technician made a 14 cm diameter hole through the middle of a cylinder that has a diameter of 20 cm and a height of 28 cm.

Step2247 [10]

Answer:

The volume of the finished cylinder is $4486.2 m^3$

Step-by-step explanation:

To find the volume of the finished cylinder, we have to first find the volume of the hole (with 14 cm diameter and a height of 28 cm) and subtract it from the volume of the original cylinder (with diameter of 20 cm and a height of 28 cm).

Note: The hole is also cylindrical in shape.

The volume of a cylinder is given as:

$V = \pi r^2h$

where r = radius, h = height

VOLUME OF THE HOLE

The diameter of the hole is 14 cm, hence, its radius is 7 cm (14 / 2 = 7)

Its volume is:

$V = \pi *7^2 * 28\\V = 4310.3 m^3$

VOLUME OF THE ORIGINAL CYLINDER

The diameter of the cylinder is 20 cm, hence, its radius is 10 cm (20 / 2 = 10)

Its volume is:

$V = \pi *10^2 * 28\\V = 8796.5 m^3$

Hence, the volume of the finished cylinder will be:

$8796.5 - 4310.3 = 4486.2 m^3$

The volume of the finished cylinder is $4486.2 m^3$

8 0

3 years ago

Select the correct answer from each drop-down menu. the four vertices of an inscribed quadrilateral divide a circle in the ratio

AleksandrR [38]

The four angles of a quadrilateral are 30°, 60°, 150°, and 120° if the four vertices of an inscribed quadrilateral divide a circle in the ratio 1:2:5:4.

<h3>What is quadrilateral?</h3>

It is defined as the four-sided polygon in geometry having four edges and four corners.

We have the four vertices of an inscribed quadrilateral divide a circle in the ratio:

1:2:5:4

Let the sides of the quadrilateral be x, 2x, 5x, 4x.

We know the sum of all angles of quadrilateral = 360°

x+2x+5x+4x=360

12x = 360

First angle, x = 30°

Seconds angle, 2x = 2×30 ⇒ 60°

Third angle, 5x = 5×30 ⇒ 150°

Fourth angle, 4x = 4×30 ⇒ 120°

Thus, the four angles of a quadrilateral are 30°, 60°, 150°, and 120°

Learn more about the quadrilateral here:

brainly.com/question/6321910

3 0

2 years ago

How to solve the equation (5-7 (8+4)×2)

xxMikexx [17]

The correct answer is -163

Explanation:

First you calculate within the parentheses; (8+4)= 12: 5-7*12*2

Next you multiply and divide; 7*12 is 84*2 is 168

Then you add and subtract; 5-168 is -163

Hope This Helps!!!

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4 years ago

10 percent increase of $29000 over 5 years,will give brainly is urgent

Tema [17]

Answer:

$43,500

Step-by-step explanation:

10 percent increase of $29,000

10% = 0.10

29,000*0.10 = 2,900

So 2,900 a year

so 2,900*5 = 14,500

Then add

29,000+14,500 = 43,500

8 0

3 years ago

I need to now why won’t I rank up I have 1500 points and 10/10 brainliest and I need to now why won’t I rank up to expert

irinina [24]

Answer:

it was doing that to me too, you just have to keep answering and eventually it will come i was waiting a week on virtuoso with all the points and brainliest i needed

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers