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lions [1.4K]
3 years ago
6

The scale for a drawing of a sports field is 5cm:20m. What will the actual length of the field be if you measure 10cm on the dra

wing?
1. 10m
2. 20m
3. 30m
4. 40m
Mathematics
1 answer:
Eduardwww [97]3 years ago
3 0

Answer:

french

Je ne sais pas ce que ça veut dire mais c'est une bonne question

Step-by-step explanation:

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Find the slope of the line passing through <br> (-8,10) and (-8,-7)
Anvisha [2.4K]

Answer:

0

Step-by-step explanation:

y2 - y1 / x2 - x1

-7 - 10 / -8 - (-8)

-17/0

= 0

5 0
3 years ago
The half-life of the isotope Osmium-183 is 12 hours. Choose the equation below that gives the remaining mass of Osmium-183 in gr
raketka [301]

The given equations are incomprehensible, I'm afraid...

You're given that osmium-183 has a half-life of 12 hours, so for some initial mass <em>M</em>₀, the mass after 12 hours is half that:

1/2 <em>M</em>₀ = <em>M</em>₀ exp(12<em>k</em>)

for some decay constant <em>k</em>. Solve for this <em>k</em> :

1/2 = exp(12<em>k</em>)

ln(1/2) = 12<em>k</em>

<em>k</em> = 1/12 ln(1/2) = - ln(2)/12

Now for some starting mass <em>M</em>₀, the mass <em>M</em> remaining after time <em>t</em> is given by

<em>M</em> = <em>M</em>₀ exp(<em>kt </em>)

So if <em>M</em>₀ = 590 g and <em>t</em> = 36 h, plugging these into the equation with the previously determined value of <em>k</em> gives

<em>M</em> = 590 exp(36<em>k</em>) = 73.75

so 73.75 ≈ 74 g of Os-183 are left.

Alternatively, notice that the given time period of 36 hours is simply 3 times the half-life of 12 hours, so 1/2³ = 1/8 of the starting amount of Os-183 is left:

590/8 = 73.75 ≈ 74

6 0
3 years ago
Pls help i will give brainly!!!
Hatshy [7]

Answer:

Greatest population density: Denmark

Smallest population density: The U.S.

Step-by-step explanation:

Population density = population / area

So let's find the population density of each country

For U.S

Population: 272,648,000

Area: 9,364,520 sq km

Population density: 272,648,000/9,364,520=29.1 ( rounded to the nearest tenth )

So the population density of the U.S is 29.1 people per sq km

For Denmark

Population: 5,248,000

Area: 42,077

Population density: 5,248,000/42,077=124.7 ( rounded to the nearest tenth )

So the population density of Denmark is 124.7 people per sq km

For Ghana

Population: 18,339,000

Area: 237,533

Population density: 18,339,000/237,533=77.2 ( rounded to the nearest tenth ).

So the population density of Ghana is 77.2 people per sq km

Now that we have calculated the population density of each country let's look back at the question

Which country has the greatest population density? Which country has the least?

Looking at the population densities we can conclude that Denmark has the largest population density at 124.7 people per sq km and the U.S. has the smallest population density at 29.1 people per sq km

3 0
3 years ago
Read 2 more answers
Carry out the following operations, and express the answer with the appropriate number of significant figures:
inn [45]
I don't understand your question
6 0
4 years ago
The special at a local pizza place says you can choose any 3 toppings from a list of 5. How many possible combinations are there
Mars2501 [29]
Will there are 3 toppings and 5 all together and you add 3 & 5 = 8 so that makes 3/8 i think !
6 0
3 years ago
Read 2 more answers
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