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podryga [215]
3 years ago
14

According to science, Earth is about 4.5 billion years old and written human history extends back about 10,000 years. Suppose yo

u represent the entire history of Earth with a 100-meter-long timeline, with the birth of Earth on one end and today at the other end. What distance represents 4 billion years? How far from the end of the timeline does written human history begin?
Mathematics
2 answers:
zalisa [80]3 years ago
5 0
It begins in 30000 bc
Lena [83]3 years ago
4 0

Answer:

4 billion years- 88,88 meters

10,000 years- 2,22*10^-7 meters

Step-by-step explanation:

In order to calculate this you just have to do a rule of three, when 4.5 billlion is 100 meters, and we just have to calculate how many meters are 4 billion and 10,000 meters:

\frac{4,5}{100} =\frac{4}{x}\\ x=\frac{400}{4,5}\\ x=88,88 meters

Now, 4.5 billions are in stadar form: 45,000,000,000 so we will use this to calculate with the rule of three of 10,000 years:

\frac{45,000,000,000}{100} =\frac{10,000}{x}\\ x=\frac{1,000}{45,000,000,000}\\ x=2,22*10^-7 meters

So those two would be the answers.

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Given isosceles trapezoid TRHY, in units what is the length of b2 if the height is 13 units, b1 is 21 units, and the area is 215
GenaCL600 [577]

We are given a trapezoid TRHY.

Height of the trapezoid = 13 units.

b1 = 21 units and

Area = 215 units squares.

We need to find the length of b2.

We know formula for area of a trapezoid.

A= \frac{1}{2} (b1+b2)\times h

Plugging values in formula.

215 = \frac{1}{2}(21+b2)× 13.

215 = 6.5(21+b2)

Dividing both sides by 6.5, we get

\frac{215}{6.5}=\frac{6.5(21+b2)}{6.5}

33.08 = 21+b2.

Subtracting 21 from both sides, we get

33.08-21 = 21-21+b2

b2 = 12.08.

<h3>Therefore,  length of b2 is 12.08 units.</h3>
4 0
3 years ago
A spinner is divided into equal sections that are labeled with integer values.
Julli [10]

Answer:

1/2

Step-by-step explanation:

look at all the numbers then look at only the negatives which are 2 then count the positive ones which are 4 from those numbers you get 2/4 simplify it, and you get 1/2.

8 0
3 years ago
10 1/2 divided by 3/8
gladu [14]
(10 1/2)/(3/8)
= (21/2)/(3/8) Convert to improper
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5 0
3 years ago
We used these functions to represent the two sides of the equation:
katrin [286]

The solution to the system of equation graphed is (-1, -3)

<h3>Solution to system of equation</h3>

Given the system of equations graphed on the plane expressed as:

f(x) = 3x

g(x) = 4x + 1

Equate

f(x) = g(x)

3x = 4x + 1

3x - 4x = 1

-x = 1

x = -1

Determine the value of y

y = 3x

y = 3(-1)

y = -3

Hence the solution to the system of equation graphed is (-1, -3)

Learn more on system of equation here: brainly.com/question/847634

#SPJ1

4 0
2 years ago
1 ÷ 3 Express your answer as a fraction
Varvara68 [4.7K]

Answer:

1/3

Step-by-step explanation:

1 ÷ 3 = 1/3

1 divided by 3 is one-third, and one-third written as a fraction is 1/3.

7 0
3 years ago
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