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3 years ago

10

There is a 5% per year decline in water in the following reservoir. if the reservoir had 2000 gallons of water in year 2001, how

much water will remain in 2017? set up the exponential decay function and solve showing your work
please help me

1 answer:

egoroff_w [7]3 years ago

5 0

Answer is 85% count by 5 17 times 5=5%

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Chile I don’t know this

jolli1 [7]

The answer is 39 degrees

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3 years ago

A geologist in South America discovers a bird skeleton that contains 80% of its original amount of C-14. N0= initial amont of C-

kap26 [50]

A geologist in South America discovers a bird skeleton that contains 80% of its original amount of C-14

We use formula $N = N_oe^{-kt}$

N0= initial amont of C-14 (at time t=0)

N= amount of C-14 at time t

t= time, in years

k= 0.0001

N is 80% of N0 that is $N= 0.80N_o$

$N = N_oe^{-kt}$

$0.80N_o = N_oe^{-kt}$

Divide both sides by N_o

$0.8=e^{-0.0001 t}$

Take ln on both sides

$ln(0.8)=lne^{-0.0001 t}$

ln(0.8) = -0.0001t ln(e)

ln(0.8) = -0.0001t

Divide both sides by -0.001

t = 2231.435513

The age of the bird skeleton is 2231 years old

5 0

3 years ago

Is 100 mm less or greater than 1 dm

kipiarov [429]

$1m=10dm=100cm=1,000mm\\\\1dm=10cm=100mm\\\\\boxed{100mm=1dm}$

6 0

3 years ago

In the poportion 1/z =4/5/8 which number is equal to z in the proportion

Nady [450]

Answer:

case 1) $z=10$

case 2) $z=5/32$

Step-by-step explanation:

case 1) we know that

Using proportion

$\frac{1}{z}=\frac{(4/5)}{8}$

solve for z

$\frac{1}{z}=\frac{(4/5)}{8}\\ \\z(4/5)=8\\ \\z=8*5/4\\ \\z=10$

case 2) we know that

Using proportion

$\frac{1}{z}=\frac{4}{5/8}$

solve for z

$\frac{1}{z}=\frac{4}{5/8}\\ \\4z=5/8\\ \\z=5/32$

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3 years ago

Which is an example of an algebraic expression? A. G>14 B. B+32 C x+4=13 D. M-37<52

forsale [732]

B, because it has no equal, greater than, or less to sign

4 0

3 years ago