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finlep [7]
3 years ago
9

A mermaid is swimming at sea level when a human comes by. She dives underwater at a rate of 8 meters per second. She continues t

o descend for 20 seconds. What depth is she now?
Mathematics
1 answer:
Kay [80]3 years ago
4 0
She will be at 160 meters
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A triangle has sides of lengths 4, 3, and 5. Is it a right triangle? Explain.
vlada-n [284]

Answer:

yes; 4² + 3² = 5²

Step-by-step explanation:

Pythagorean theorem.

In a right triangle the square of the hypotenuse is equal to  the sum of the squares of the other two sides. Hypotenuse is the longest side of the triangle.

4² + 3² = 5²

16 + 9 = 25

25 = 25  

7 0
3 years ago
In a simplified model of a hydrogen atom, the electron moves around the proton nucleus in a circular orbit of radius 0.53 × 10−1
tresset_1 [31]
For the answer to the question above,
 <span>a) Use F = k * q1 * q2 / d² 
where k = 8.99e9 N·m²/C² 
and q1 = -1.602e-19 C (electron) 
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b) Here, just use F = ma 
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c) Now use a = v² / r 
where a was found above 
and r was given 

d) period T = 2π / ω = 2πr / v 
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7 0
3 years ago
If you have 49 questions on a test what score must you get to pass the test?​
arsen [322]

Well, on every test I have at a school and I believe most schools do this. You need at leasr 80% to pass. But to pass you'd most likely need 80% or 70%. But if you get an 80% you'll be sure to pass! I hope this helps you!

7 0
3 years ago
Please help me someone
katovenus [111]

Answer: Surface area is 169π

Step-by-step explanation:

A=\pi \cdot \:d^2

A=\pi d^2

A=\pi 13^2

A=169\pi

6 0
3 years ago
Round 124,607 to the nearest hundred thousand
ANEK [815]
The answer is 100,000
<span>In order to answer this, you must got to the number in the hundred thousand spot, in this case 1, and the check the number next to it. If it is 5 or more, the number becomes bigger, and if it is less than 5, you keep the number the same. After this, any numbers to the right become zeros. </span>
6 0
3 years ago
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