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3 years ago

PLZ ANSWER BOTH QUESTIONS

Mathematics

1 answer:

Firdavs [7]3 years ago

3 0

Answer:

8(3) + 10(7) = 94

8b + 10l = y

Step-by-step explanation:

First, lets make an equation to solve for the numbers.

8b + 10l = Total Amount of Money (y)

Plug in the values.

8(3) + 10(7) = 94 is the amount of money he gets if he does 3 hours of babysitting and 7 hours of lifeguarding.

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3 years ago

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butalik [34]

Answer:

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Step-by-step explanation:

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3 years ago

A chemical flows into a storage tank at a rate of (180+3t) liters per minute, where t is the time in minutes and 0<=t<=60

Yuliya22 [10]

Answer:

The amount of the chemical flows into the tank during the firs 20 minutes is 4200 liters.

Step-by-step explanation:

Consider the provided information.

A chemical flows into a storage tank at a rate of (180+3t) liters per minute,

Let $c(t)$ is the amount of chemical in the take at t time.

Now find the rate of change of chemical flow during the first 20 minutes.

$\int\limits^{20}_{0} {c'(t)} \, dt =\int\limits^{20}_0 {(180+3t)} \, dt$

$\int\limits^{20}_{0} {c'(t)} \, dt =\left[180t+\dfrac{3}{2}t^2\right]^{20}_0$

$\int\limits^{20}_{0} {c'(t)} \, dt =3600+600$

$\int\limits^{20}_{0} {c'(t)} \, dt =4200$

So, the amount of the chemical flows into the tank during the firs 20 minutes is 4200 liters.

5 0

3 years ago

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nirvana33 [79]

Answer:

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3 years ago

What percent of 48 is 18

arsen [322]

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