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vlabodo [156]
2 years ago
6

Elmer has a collection of 30 fossils. Of these, 21% percent are fossilized snail shells. How many fossilized snail shells does E

lmer have?

Mathematics
1 answer:
postnew [5]2 years ago
6 0
Hiiiiiiiiiiiiiiii friends....
here is your answer
hope it help you....

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A six-foot-tall person is standing next to a flagpole. The person is casting a shadow 1 1/2 feet in length, while the flagpole i
lara31 [8.8K]

Answer: 20 ft

This problem can be solved by the Thales’s theorem, which states:

<em>Two triangles are similar when they have equal angles and proportional sides  </em>

It should be noted that to apply Thales' Theorem, it is necessary to establish <u>the two triangles are similar</u>, that is, that t<u>hey have the corresponding angles equal or that their sides are proportional to each other.  </u>

<u />

Now, if we measure the shadow of the flagpole and the shadow of the person, <u>at the same moment</u>, we can use the first Thales' Theorem to calculate the height of the flagpole, knowing the height of the person.

In this case we have two similar triangles (Figure attached) where H is the height of the flagpole, h=6 ft is the height of the person, A=5 ft is the length of the shadow of the flagpole and a=1\frac{1}{2}=1.5 ft is the length of the shadow of the person.

Having this clear, we can write the following relation with both similar triangles:

\frac{H}{h}=\frac{A}{a}   (1)

We know all these lengths except H, which is the value we want to to find.  

So, in order to approach this problem we have to find H from equation (1):  

H=\frac{A}{a}h  

H=\frac{5 ft}{1.5 ft}(6 ft)  

Then:

H=20 ft >>>>>This is the height of the flagpole

4 0
3 years ago
The population of a small town can be described by the equation PN equals 4000+70n. Where n is the number of years after 2005. E
ruslelena [56]

Answer:

The current population (in 2005) is 4000 because it is the constant. The slope tells us how many people are added to the population, so 70 per year. For ex. 2008 (2008- 2005 = 3=> 3 x 70 = 210 => 210 + 4000 = 4210).

8 0
3 years ago
Please help with graph for geography!
dlinn [17]

Answer:

My guy, it's C...

Step-by-step explanation:

U asked this already XD

8 0
3 years ago
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Please help!! <br> I will mark brainiest
katovenus [111]

Answer:

30 degrees

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
In 2013, the Centers for Disease Control and Prevention surveyed 450,000 adults ages 18 and older and found that 79% of them do
belka [17]

Answer:

Percent = 79\%

Step-by-step explanation:

Given

Adults = 450000

Rate = 79\% --- Those that do not get recommended amount of exercise

Required

The percentage that do not get the recommended amount of exercise

From the question, we have 79% to be the percentage of adults that do not get the recommended amount of exercise. This 79% represents the required percentage

Hence:

Percent = 79\%

6 0
3 years ago
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