2 years ago

Factor: x(y − 1) + y(y − 1)

Mathematics

1 answer:

SCORPION-xisa [38]2 years ago

6 0

The answer is A I hope

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Step-by-step explanation:

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Select all the relationships that demonstrate a positive association between veriables (multiple choice)

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2 years ago

Situation:A researcher in North America discoversa fossile that contains 65% of its originalamount of C-14..-ktN=NoeNo inital am

zheka24 [161]

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We have been given the equation of the decay as

$\begin{gathered} N=N_0e^{-kt} \\ where\text{ } \\ N_0=initial\text{ amount of C-14 at time t} \\ N=amount\text{ of C-14 at time t = 65\% of N}_0=0.65N_0 \\ k=0.0001 \\ t=time\text{ in years = ?} \end{gathered}$

So we are looking for the time

Plugging the values into the equation, we have

$\begin{gathered} N=N_0e^{-kt} \\ 0.65N_0=N_0e^{-0.0001t} \\ e^{-0.0001t}=\frac{0.65N_0}{N_0} \\ e^{-0.0001t}=0.65 \end{gathered}$

Taking Ln of both sides, we have

$\begin{gathered} ln(e^{-0.000t})=ln(0.65) \\ -0.0001t=ln(0.65) \\ t=\frac{ln(0.65)}{-0.0001} \\ t=4307.82916 \end{gathered}$

Hence the answer is 4308 to the nearest year

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9 months ago

Suzanne needs material for her school project. She buys 4.75 yards of material at $5.37 a yard. What is the total cost of the ma

vovangra [49]

The material costs 5.37 for 1 yard.

Multiply the cost of 1 yard by the number of yards bought:

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The answer would be D.

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3 years ago

Really need you guys help on this problem... please help me

erma4kov [3.2K]

Here it is.. you need to calculate some numbers

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3 years ago