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o-na [289]
3 years ago
12

If the ratio of students with green shirts to total students in a class is 3 to 8, and are 12 students wearing green shirts, how

many are there without green shirts?
Advanced Placement (AP)
2 answers:
svetoff [14.1K]3 years ago
8 0
The answer would be 20
jekas [21]3 years ago
5 0

Answer:

20

Explanation:

You would set up a proportion in order to solve this

3 green           12 green

------------     =   ------------

8 total                x total

Then you would cross mulitply for x and get 32. Since that is the total number, you would have to subract the 12 from 32 to get 20.

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Question 3 of 10
Drupady [299]

Answer:

C: Speaker 1

Explanation:

Hope this helps:)

8 0
3 years ago
A visible streak of light which shows the path of rocky object which has entered Earth’s atmosphere is?
Alika [10]
The answer is a meteor.
Meteors make flashing light when they enter the Earth's atmosphere. This is actually meteors on fire, because our atmosphere makes them burn when they come in contact, and crashes them under the pressure. This makes up for a beautiful sight on the night sky, and people often refer to the burning meteors as ''falling stars'', and make wishes as well.
7 0
3 years ago
A conical water tank is 24 ft high and has a radius of 10 ft at the top. If water flows into the tank at a rate of 20 cubic feet
Akimi4 [234]

Answer:

0.027 cubic ft/min

Explanation:

Volume of water is V=V(t) Depth of water is h=h(t)

The relationship between V and h is

V=π/3.r2.h

Let

h0= the height of the cylinder = 24ft, r0= the radius of the opening = 10ft.

Since water level (h) rise with respect to flow rate we find an expression for r and substitute into V

r/h = r0/h0= 10/24 = 5/12

r = (5/12) h,

Substitute for r in V

so,

V=1/3.π.(h2)square = 1/3.π. 25/144.(h3)

When

h= 16ft

and dV/dt = 20ft3/min

,

dV/dt =1/3*π*25/144*h3*(dh/dt)

20ft3/min= 1/3*π* 25/144*h3*(dh/dt)

20 = 1/3*π*(16)3.(dh/dt)

Make dh/DT subject of formula

dh/dt=(20*3*144)/(25*π*4096) = 8640/321740.8

=

dh/dt= 0.027 ft3/min

3 0
3 years ago
With a half life of 28.8 years, how long will it take 1g of strontium-90 to decay to 250 mg
soldier1979 [14.2K]

The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years

<h3>What is the half life of an element?</h3>

The formula for half life is;

A(t) = A₀ * (¹/₂)^(t/t_1/2)

Where;

A(t) is amount left after t years

A₀  the initial quantity of the substance that will undergo decay;

t_1/2 is the half-life of the decaying quantity.

We are given;

t_1/2 = 28.8 years

A₀ = 1 g

A(t) = 250 mg = 0.25 g

Thus;

0.25 = 1 *  (¹/₂)^(t/28.8)

log 0.25 = (t/28.8) log (1/2)

-0.60206 = (t/28.8) * -0.3010

t = 2 * 28.8

t = 57.6 years

Read more about half life at; brainly.com/question/11152793

6 0
2 years ago
(Sociology) pls help: What does philosopher Thomas Kuhn argue about truth?
Orlov [11]

Answer:

He said that science wasn't constantly approaching the truth.

Explanation:

Thomas Kuhn had a very different view when it came to science. Hope I have helped.

5 0
3 years ago
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