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3 years ago

10

joe traded 270 America dollars and receive 3000 Mexican pesos. when he return, he had 100 pesos left. how much will he receive i

n dollar

1 answer:

larisa86 [58]3 years ago

8 0

He will get an exchange of $5.20.

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This is a warmup for your first project. The drug valium is eliminated from the bloodstream through a decay process with a half-

frosja888 [35]

Step-by-step explanation:

a. We have v as the amount of drug(mg) in the blood at time t (hrs)

b. Flow rate in = k litre/he

For a circulatory system we have the flow rate in and flow rate out to be the same

Therefore,

Flow rate out = k litre/hr

concentration of drug going in = 0mg/litre

Concentration of drug going out = v mg/litre

V(0) = 20mg since 20mg was taken at midnight

V(0) = 20

Half life t1/2 = 36 hours

V(36) = v(0)/2

= 20/2

= 10mg

C. $ivp = \frac{dv}{dt}$ $= -kv$

$v(0) = 20mg\\v(36) = 10mg$

d. solution

$\frac{dv}{dt} = -kt\\ln(v) = ln(c) - kt$

$\frac{v}{c} = e^{-kt} = v=ce^{-kt}$

v(0) = 20

$ce^{-k(0)} =20$

c = 20

so

$v(t) = 20e^{-kt}$

e.

$t\frac{1}{2}=36hours\\ v(36)= 10$

$10 = 20e^{-36k}$

$\frac{1}{2} =e^{-36k}$

we take log

$k=\frac{ln(2)}{36}$

please check attachment for answer f

8 0

3 years ago

A small rectangular tissue box is 0.5 feet long, 0.2 feet wide, and 0.3 feet deep. The box is filled completely with tissues

Verizon [17]

Answer:

the volume of the tissue box would be 0.2×0.5×0.3. the volume of a rectangular prisim is V=l×w×h

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2 years ago

there are 700 lockers on the 6th grade hallway. three fifths of the lockers are being used. how many lockers are not being used

Tasya [4]

Answer: 280 lockers

Step-by-step explanation:

3/5*700= 420 so 420 are being used and 700-420=280 lockers not in use

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3 years ago

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The graph below shows the velocity f(t) of a runner during a certain time interval:

Jlenok [28]

For this case, the first thing we must do is take into account the definition of the axes:
the x axis is time in seconds
the y axis is velocity in meters per secon

Then, we look for the cut point with the y axis, which is given by:
(0, 2)
This means that the initial speed is 2 m / s.

We now look for the cut point with the x axis, which is given by:
(8, 0)
This means that the speed is 0 m / s, so the runner stopped when the time is 8 seconds.

Answer:
The initial velocity of the runner was 2 m / s, and the runner stopped after 8 seconds.

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3 years ago

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Moria bought $0.65 worth of stamps. She paid for them with 15 coins. what coins did she use?

igomit [66]

1 quarter, 2 dimes, 2 nickels, 10 pennies

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3 years ago