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2 years ago

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Which of the following could be the line of best fit? A. y = -7.1x + 7157 B. y = -1.5x + 7777 C. y = 8.1x + 1332 D. y = 11134x -

40407000

1 answer:

KengaRu [80]2 years ago

8 0

Answer:

B

Step-by-step explanation:

Use demos thats what I did.

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Water is pumped into a tank at a rate of r (t)=30(1−e− 0.16t) gallons per minute, where t is the number of minutes since the pum

Vlad1618 [11]

Answer:

The total volume of the water in the tank after 20 minutes = 1220 gallons

Step-by-step explanation:

Rate of water pumped into the tank r (t) = 30 (1 - $e^{-0.16 t}$ )

Initial volume of water in the tank = 800 gallons

The water in the tank after 20 minutes = Initial volume of water in the tank + Volume of water being pumped in the tank

$V_{total} = V_{i} + V_{pump}$

$V_{pump}$ = $\int\limits^a_b {r(t)} \, dt$

Where a = 0 , b = 20

Put the value of r (t) in above equation we get

$V_{pump}$ = $\int\limits^a_b {30 (1 - e^{-0.16t} )} \, dt$

$V_{pump}$ = $30 [ t + \frac{e^{-0.16t} }{0.16} ]$

$V_{pump}$ = $30[ (20- 0) + \frac{1}{0.16}(e^{-0.16 (20)}- e^{0} )$

$V_{pump}$ = 420 gallon

Now, total volume in the tank

$V_{total} = V_{i} + V_{pump}$

$V_{total} = 800 + 420$

$V_{total} = 1220 \ gallon$

Therefore the total volume of the water in the tank after 20 minutes = 1220 gallons

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3 years ago

If you have 12 donuts for $5.40, what is the cost of one donut

anygoal [31]

Answer:

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Step-by-step explanation:

you have to divide 5.40 by 12

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$2,000 at 9% simple interest; deposit $1,600

earnstyle [38]

oops sorry.

180 was the 9% interest.

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Step-by-step explanation:

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