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marusya05 [52]
3 years ago
9

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Mathematics
1 answer:
Anna007 [38]3 years ago
4 0

Answer:

-6x cubed y to the fifth power -6x^3y^5

Step-by-step explanation:

3xy^2(-2x^2y^3)

-6x^3y^5

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Carbon-14 has a half life of 5730 years. A bone sample from a bird has 80% of its original Carbon-14. Fine how long ago the bird
vichka [17]

Answer:

1845 years

Step-by-step explanation:

Decay of Carbon-14 is usually modeled by an exponential function. It x is the number of years since the original amount was brought into existence, then the fraction remaining (y) is modeled by ...

... y = (1/2)^(x/5730)

We want to find the value of x when y = 80% = 0.80. The equation is then ...

... 0.80 = 0.50^(x/5730)

Taking logarithms, we get

... log(0.80) = (x/5730)·log(0.50)

Multiplying by the inverse of the coefficient of x, we have

... x = 5730·log(0.80)/log(0.50) ≈ 1845 . . . . years

6 0
3 years ago
Simplify this expression.<br><br> 20.25−912+11
DIA [1.3K]

Answer:

-880.75

Step-by-step explanation:

Subtract 912 from 20.25 first then add 11.

7 0
4 years ago
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Solve the equation. (please *w*)<br> -4(2 - 1.2x) = 40
Ierofanga [76]

Solving for x would look like

rewrite: -4(2-1.2x)=40

distribute: -8+4.8x=40

add 8 to both sides of the equation: 4.8x=48

isolate x: x=10

So x = 10

4 0
4 years ago
Joelle was asked to find the missing endpoint of a segment when given an endpoint of –6 +3i and a midpoint of –13 + i. Her work
shtirl [24]

Answer:

C

Step-by-step explanation:

\frac{-6+a}{2} =-13\\-6+a=-13*2\\a=-26+6\\a=20\\\frac{3i+b i}{2}=i\\\\ \\3+b=2\\b=2-3=-1\\

middle point is 20-i

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4 years ago
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Claire jogs no more than 20 miles per week. Which inequality represents the number of miles she runs each week? A.x &gt; 20 B.x
Anni [7]

Answer: I’m pretty sure its D

Step-by-step explanation:I will tell you once i finish my test.....

Yes, the correct answer is D. I just finished my test and received a 100.

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3 years ago
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