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2 years ago

7

I NEED AN ANSWER ASAP ILL GIVE 20 POINTS

2 answers:

Mars2501 [29]2 years ago

7 0

Answer:

sorry I really need these points im so so sorry bro I need it too pass highschool

Step-by-step explanation:

matrenka [14]2 years ago

5 0

Because number line divide into 2 parts, so denominator of fraction is 2

whole number 1, fraction = 2/2

whole number 2, fraction = 4/2

whole number 3, fraction = 6/2

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How to use a number line to add 235 +123

marshall27 [118]

You count up to 235 which then gives you 358

3 0

3 years ago

Louis created a square garden with a side length of 5 feet. what is the total area of the garden

jasenka [17]

Answer:

the answer of the question is 25

8 0

3 years ago

A tank with a capacity of 500 gal originally contains 200 gal of water with 100 lb of salt in solution. Water containing 1 lb of

saw5 [17]

Let A(t) denote the amount of salt in the tank at time t.

Salt flows in at a rate of

(1 lb/gal) * (3 gal/min) = 3 lb/min

and flows out at a rate of

(A(t)/(200 + t) lb/gal) * (2 gal/min) = 2 A(t)/(500 + t)

(in case you're unsure about the denominator: the tank starts off with 200 gal of solution, and each minute solution flows in at a rate of 3 gal/min and thus the tank gains (3 gal/min) * (1 min) = 3 gal. At the same time, solution flows out at a rate of 2 gal/min and thus the tank loses 2 gal, giving a net change in volume of (3 - 2)*t = t gal)

Then the net rate of salt flow is given by the ODE,

$\dfrac{\mathrm dA(t)}{\mathrm dt}-\dfrac{2A(t)}{200+t}=3$

Multiply both sides by $(200+t)^{-2}$ :

$(200+t)^{-1}\dfrac{\mathrm dA(t)}{\mathrm dt}-2(200+t)^{-3}A()=3(200+t)^{-2}$

$\implies\dfrac{\mathrm d}{\mathrm dt}\bigg((200+t)^{-2}A(t)\bigg)=3(200+t)^{-2}$

Integrating both sides and solving for $A(t)$ gives

$(200+t)^{-2}A(t)=-\dfrac3{200+t}+C$

$A(t)=-2(200+t)+C(200+t)^2$

The tank starts off with 100 lb of salt in solution, so $A(0)=100$ and we find

$100=-2(200)+C(200)^2\implies C=\dfrac1{80}$

and so

$A(t)=-2(200+t)+\dfrac{(200+t)^2}{80}=\dfrac{(200+t)(40+t)}{80}$

The tank will begin to overflow once the volume of solution reaches 500 gal; this happens when

$500=200+t\implies t=300$

or 300 minutes or 5 hours after solution starts flowing. At this point, the tank will contain

$A(300)=2125$

or 2125 lb of salt.

Theoretically, the amount of salt in the tank will increase forever, since $A(t)\to\infty$ as $t\to\infty$ .

6 0

4 years ago

Help me please in geometry

weeeeeb [17]

A I think that is right

8 0

4 years ago

What time is 5 3/4 hours after 11:32 pm?<br> Please show work, thank you.

poizon [28]

we have to first convert fraction of hours into minutes

1 hour is equivalent to 60 minutes

then 3/4 hour is - 3/4 of 60

when the of function is used we have to multiply the 2 numbers

then $\frac{3}{4} * 60 = \frac{3*60}{4} = \frac{180}{4} = 45$

3/4 of an hour is equivalent to 45 minutes

then we have to add 5 hours and 45 minutes to 11.32 pm

add 5.45 to 11.32

11.32

5.45 +

-------

16.77

then its 16 hours and 77 minutes

an hour has only 60 minutes so we subtract 60 minutes from 77 minutes and add that hour to 16 hours

16 hours + 1 = 17 hours

77 minutes - 60 minutes = 17 minutes

17 hours 17 minutes

time is given in pm therefore its a 12 hour clock

so we have to subtract 12 hours from 17 hours 17 minutes

17.17 hours - 12 hours = 5.17

the new time is 5.17 am of the next day

8 0

3 years ago

Read 2 more answers