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3 years ago

ANSWER FAST PLZ 25 POINTS!!!!!!!!!!

Mathematics

1 answer:

katovenus [111]3 years ago

6 0

Answer:

25.21 sq yd

Step-by-step explanation:

the equation is 2r(3.14)

4x2=8

8x3.14=25.12

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Wade can type 800 words in a quarter of an hour. How many words per minute can Wade type?

Mumz [18]

Answer:

Quarter of an hour = 25 minutes

800 words in 25 minutes.

800 ÷ 25= 32

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3 years ago

PLEASE HELP AGAIN ASAP!

Dovator [93]

15/5 goes to all of them..

15/5 = 3

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3 years ago

Hello i need help on this pls <br>

zvonat [6]

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3 years ago

A large tank is filled to capacity with 600 gallons of pure water. brine containing 4 pounds of salt per gallon is pumped into t

nignag [31]

If $A(t)$ is the amount of salt in the tank at time $t$ , then the rate at which the amount of salt in the tank changes is given by

$\dfrac{\mathrm dA(t)}{\mathrm dt}=\dfrac{4\text{ lbs}}{1\text{ gal}}\dfrac{6\text{ gal}}{1\text{ min}}-\dfrac{A(t)\text{ lbs}}{600\text{ gal}}\dfrac{6\text{ gal}}{1\text{ min}}$
$\dfrac{\mathrm dA}{\mathrm dt}=24\dfrac{\text{lb}}{\text{min}}-\dfrac{A(t)}{100}\dfrac{\text{lb}}{\text{min}}$

Let's drop the units for now. We have

$\dfrac{\mathrm dA(t)}{\mathrm dt}+\dfrac{A(t)}{100}=24$
$e^{t/100}\dfrac{\mathrm dA(t)}{\mathrm dt}+e^{t/100}\dfrac{A(t)}{100}=24e^{t/100}$
$\dfrac{\mathrm d}{\mathrm dt}\left[e^{t/100}A(t)\right]=24e^{t/100}$
$e^{t/100}A(t)=\displaystyle24\int e^{t/100}\,\mathrm dt$
$e^{t/100}A(t)=2400e^{t/100}+C$
$A(t)=2400+Ce^{-t/100}$

We're given that the water is pure at the start, so $A(0)=0$ , giving

$A(0)=0=2400+Ce^{-0/100}\implies C=-2400$

So the amount of salt in the tank (in lbs) at time $t$ is

$A(t)=2400\left(1-e^{-t/100}\right)$

4 0

3 years ago

What does -8c=96 equals

zmey [24]

Answer:

-12

Step-by-step explanation:

if you divide 96 by -8 you will get you answer to c -12

3 0

3 years ago