2 years ago

Which of the following expressions are equivalent?

Mathematics

1 answer:

shtirl [24]2 years ago

5 0

Answer:

the second option

Step-by-step explanation:

5+(1+3)= (5+1) +3

hope this helps :)

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A country's population in 1992 was 72 million. In 1998 it was 76 million. Estimate the population in 2012 using the exponential

stepan [7]

We assume the annual percentage increase is the same. We will work out the constant k using the formula

We have
P = 76
A = 72
t = 6 years (from 1992 to 1998)

Substitute into the formula
$76=72e^{6k}$
$\frac{76}{72}=e^{8k}$
Take log both sides give
$ln( \frac{76}{72})=ln(e^{6k})$
$0.05406722127=6k$
$k=0.009$

We can now work out the number of population by the end of 2012 using the formula

We have
A = 72 million
k = 0.009
t = 10 years (1992 to 2012)

$P=72e^{0.009*10}$ $P=78.78$ ≈79 million

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3 years ago

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hoa [83]

Answer:

It has risen by $169

Step-by-step explanation:

299

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169

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coldgirl [10]

The top right quadrant

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3 years ago

Lindsay got her haircut the cost of a haircut for $16 if she wants to tip for hairstylist 20% how much does she leave for the ti

gtnhenbr [62]

Answer:

$3.20

Step-by-step explanation:

I hope this helps.

Sorry if I'm wrong.

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Basile [38]

Check the picture below.

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