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Anvisha [2.4K]
3 years ago
7

HELP, it’s question 17

Mathematics
2 answers:
Dovator [93]3 years ago
8 0

Answer: A

Step-by-step explanation:

snow_lady [41]3 years ago
7 0

Answer:

1/3 of 60 = 20

2/5 x 3 = 1 1/5

A: 1 1/5 cans of paint

Step-by-step explanation:

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A tank contains 200 liters of fluid in which 50 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu
mel-nik [20]

At the start, the tank contains A(0) = 50 g of salt.

Salt flows in at a rate of

(1 g/L) * (5 L/min) = 5 g/min

and flows out at a rate of

(A(t)/200 g/L) * (5 L/min) = A(t)/40 g/min

so that the amount of salt in the tank at time t changes according to

A'(t) = 5 - A(t)/40

Solve the ODE for A(t):

A'(t) + A(t)/40 = 5

e^(t/40) A'(t) + e^(t/40)/40 A(t) = 5e^(t/40)

(e^(t/40) A(t))' = 5e^(t/40)

e^(t/40) A(t) = 200e^(t/40) + C

A(t) = 200 + Ce^(-t/40)

Given that A(0) = 50, we find

50 = 200 + C  ==>  C = -150

so that the amount of salt in the tank at time t is

A(t) = 200 - 150 e^(-t/40)

7 0
3 years ago
Which number should each side of the equation 2/3x=10 be multiplied by to produce the equivalent equation of x = 15?
STALIN [3.7K]

Answer:

3/2

Step-by-step explanation:

If you want to get the coefficient of x to be 1, you multiply by the reciprocal of the coefficient. The reciprocal is 3/2, so you multiple by 3/2

8 0
3 years ago
Romeo first saw Juliet when she was 87 meters away. He started running toward her at a rate of 5 m/s Three seconds later Juliet
Vanyuwa [196]

3.625 seconds, if I did my math correctly.

5 0
3 years ago
An ordered pair is written as:<br> (domain, range)<br> (range, domain)
topjm [15]

Answer:

what is the question

Step-by-step explanation:

8 0
3 years ago
OK so I need help on this trigonometry problem, I need it by June 3rd HELP ME PLZ!
Ann [662]

Answer:

a=16 b =10 or any other combination that gives 160

a = 20 b=8

a = 32 b = 5

Step-by-step explanation:

The area of a triangle using the lengths of two sides and the sine of the included angle is ½ ab sin C  where a and b are sides and C is the angle.

A =40 = 1/2 ab sin 30°

sin 30° = 1/2 so

40 = 1/2*ab*1/2

40 =1/4 ab multiply each side by 4

160 = ab

any combination of sides that gives you 160 will work

Let's check if a=16 b =10

A = 1/2*16*10 sin 30°

A = 1/2*160*1/2

A = 40

4 0
2 years ago
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