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const2013 [10]
4 years ago
7

A locker combination has three nonzero digits, and digits cannot be repeated. If the first two digits are even, what is the prob

ability that the third digit is even?
Mathematics
1 answer:
jonny [76]4 years ago
7 0
Depends on the size of the lock, some locks go to 50 while others got to 40 it would 20/40
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Maurinko [17]
25. You have to do 65x65-(60x60) and the square root it
6 0
3 years ago
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there are 122 males and 78 females working at the hospital. What percentage of the hospitals workforces is female?
Diano4ka-milaya [45]
122+78= 200 total
therefore 78/200 * 100= 69%

3 0
3 years ago
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If c is the line segment connecting (x1,y1) to (x2,y2), show that the line integral of xdy-ydx=x1y2-x2y1......this is in a chapt
MatroZZZ [7]
Green's theorem doesn't really apply here. GT relates the line integral over some *closed* connected contour that bounds some region (like a circular path that serves as the boundary to a disk). A line segment doesn't form a region since it's completely one-dimensional.

At any rate, we can still compute the line integral just fine. It's just that GT is irrelevant.

We parameterize the line segment by

\mathbf r(t)=\langle x_1,y_1\rangle(1-t)+\langle x_2,y_2\rangle t
\implies\mathbf r(t)=\langle x_1+(x_2-x_1)t,y_1+(y_2-y_1)t\rangle

with 0\le t\le1. Then we find the differential:

\mathbf r(t)\equiv\langle x,y\rangle=\langle x_1+(x_2-x_1)t,y_1+(y_2-y_1)t\rangle
\implies\mathrm d\mathbf r\equiv\langle\mathrm dx,\mathrm dy\rangle=\langle x_2-x_1,y_2-y_1\rangle\,\mathrm dt

with 0\le t\le1.

Here, the line integral is

\displaystyle\int_{\mathcal C}x\,\mathrm dy-y\,\mathrm dx=\int_{\mathcal C}\langle-y,x\rangle\cdot\langle\mathrm dx,\mathrm dy\rangle
=\displaystyle\int_{t=0}^{t=1}\langle-y_1-(y_2-y_1)t,x_1+(x_2-x_1)t\rangle\cdot\langle x_2-x_1,y_2-y_1\rangle\,\mathrm dt
=\displaystyle\int_{t=0}^{t=1}(x_1y_2-x_2y_1)\,\mathrm dt
=(x_1y_2-x_2y_1)\displaystyle\int_{t=0}^{t=1}\,\mathrm dt
=x_1y_2-x_2y_1

as required.
4 0
4 years ago
On a 40 minute bike ride the bicycle wheels revolve 2400 times. What is the constant of proportionality?
azamat

Answer:

60 rev/min (Answer D)

Step-by-step explanation:

Calculate it!  

2400 revolutions

-------------------------- = 60 rev/min

  40 minutes


6 0
3 years ago
Heber pays $40 each month to stream Disney+ on one device.
photoshop1234 [79]

Answer:

5

Step-by-step explanation:

take your price and subtract the monthly price

115-40=75

now you have the price of all your extra devices summed up

75÷15=5 extra devices

5 0
3 years ago
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