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3 years ago

5

Can someone please help I’m stuck

2 answers:

Stella [2.4K]3 years ago

4 0

Yeah yeah what he said ^

OLga [1]3 years ago

3 0

Yeah so it goes 6, 22, 28, 68, 24, then 43 if that makes sense

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Solve for x <br><br><br><br><br> qwertyuiopasdfghjklzcvbnm

Ludmilka [50]

The triangles ABD, ADC and ABC are similar (AA stands for "angle, angle" and means that the triangles have two of their angles equal).

If two triangles have two of their angles equal, the triangles are similar.

Therefore the sides of triangles are in proportion.

$\dfrac{c}{6}=\dfrac{2}{c}$

cross multiply

$c\cdot c=6\cdot2\\\\c^2=12\to c=\sqrt{12}$

Use the Pythagorean theorem for calculate x:

$x^2=2^2+(\sqrt{12})^2\\\\x^2=4+12\\\\x^2=16\to x=\sqrt{16}\to\boxed{x=4}$

8 0

3 years ago

If a+bi, where b is not equal to 0, is a complex zero of a polynomial with real coefficients, then so is its _____ , a-bi.

Jobisdone [24]

Hello,

answer f: conjugate

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3 0

3 years ago

A farmer in China discovers a mammal hide that contains 37% of its original amount of C-14. Find the age of the mammal hide to t

Naya [18.7K]

Answer: 54678 years

Step-by-step explanation:

This can be solved by the following equation:

$N_{t}=N_{o}e^{-\lambda t}$ (1)

Where:

$N_{t}=54\%=0.54$ is the quantity of atoms of carbon-14 left after time $t$

$N_{o}=1$ is the initial quantity of atoms of C-14 in the mammal hide

$\lambda$ is the rate constant for carbon-14 radioactive decay

$t$ is the time elapsed

On the other hand, $\lambda$ has a relation with the half life $h$ of the C-14, which is $5730 years$ :

$\lambda=\frac{ln(2)}{h}=\frac{ln(2)}{5730 years}=1.21(10)^{-4} years^{-1}=0.000121 years^{-1}$ (2)

Substituting (2) in (1):

$0.54=1e^{-(0.000121 years^{-1}) t}$ (3)

Applying natural logarithm on both sides of the equation:

$ln(0.54)=ln(1e^{-(0.000121 years^{-1}) t})$ (4)

$-0.616=-(0.000121 years^{-1}) t$ (5)

Isolating $t$ :

$t=\frac{-0.616}{-0.000121 years^{-1}}$ (6)

$t=54677.68 years \approx 54678 years$ (7) This is the age of the mammal hide

8 0

3 years ago

How to solve this question

cupoosta [38]

8.83176088663 is the answer

7 0

3 years ago

Show your work <br> Solve multi step equation <br> 4d-3-2d=-15

Fed [463]

I believe this is how you do it

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4 years ago

Read 2 more answers