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babunello [35]
4 years ago
10

What is accurate about the scientific results learned by counting tree rings? Study of tree rings and associated geology shows t

hat the Earth is 12,000 years old, but no older. Study of tree rings and associated geology shows that the Earth is exactly 12,429 years old. Study of tree rings by themselves shows that the Earth is 4.6 billion years old. Study of tree rings and associated geology shows that the Earth is more than 12,429 years old. Study of tree rings and associated geology proves that the Earth is 5,000 years old, but no older.
Mathematics
1 answer:
marissa [1.9K]4 years ago
5 0

Answer:

The correct answer is "Study of tree rings and associated geology shows that the Earth is more than 12,429 years old"

Step-by-step explanation:

While tress have been growing long enough to prove the earth is more than 12,000 years old, it is not able to prove much longer than that. Luckily geology is able to show is that Earth is over 4.6 billions years old. As a result, the above is the only true statement.

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A person that is 5 feet tall casts a shadow 25 feet long. How long is the shadow of a tree that is 15 feet tall?
fiasKO [112]
The person and his shadow make a right triangle as well as the tree and it's shadow. they will be similar right triangles containing angles that are equal. I'm in similar triangles the angles are proportional so a ratio could be used to determine the shadow length. this ratio is:
25/5 = x/15
(Notice that both the height of the person and
the height of the tree height of the tree are on
the bottom because these would be similar
sides and the same for the shadows with both
on top. this could easily have been switched
with the shadows on bottom and heights on
top like:
5/25 = 15/x
however I noticed the 25/5 could easily be
reduced. this eliminated the need for cross
multiplication.)

The 25/5 can be reduced to 5:
5 = x/15
and then multiply both sides by 15 and you get:
x = 75
so the answer is 75 feet long.

this can be checked various ways. using trigonometry we have the opposite and adjacent sides so tangent could be used to find the angle between the shadow and the hypotenuse. this is:
tan (x) = opposite/adjacent
opposite = height
adjacent = shadow
so:
tan (x) = 5/25 for person
tan (x) = 15/75 for tree
these equations both reduce to:
tan (x) = 1/5
And of both equations are the same then the angLee are equal creating similar triangles and a correct answer
4 0
3 years ago
James bought a movie ticket and wants to pay for some friends. A ticket costs $6, and he has $38. How many friends can he pay fo
Firlakuza [10]

Answer:

6 friends, $2 left

Step-by-step explanation:

He has $38 dollars, but each ticket costs $6.  Divide them to see how many tickets he can buy.

38/6 = 6 remainder 2

He can pay for 6 friends, and the remainder is $2.

6 0
3 years ago
Billy has $3.00. Bubble gum costs $.30. He bought four pieces.
xenn [34]

Answer:

$0.30 x 4= $1.20

$3.00 divided by $1.20= $1.80

Step-by-step explanation:

I hope this is what you were looking for

7 0
4 years ago
Read 2 more answers
Which measurement is most likely to be used to determine the diameter of the well cap?
ycow [4]

Answer:

B. the second one

Step-by-step explanation:

7 0
3 years ago
Can you help me with this? thanks made it 20 points!
liraira [26]
I agree with Roaltyjess<span />
8 0
3 years ago
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