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Slav-nsk
3 months ago
12

A wireless garage door opener has a code determined by the up or down setting of 17 switches. How many outcomes are in the sampl

e space of possible codes?
Mathematics
1 answer:
babunello [11.8K]3 months ago
4 0

Answer:

The sample space includes 131072 possible codes.

Step-by-step explanation:

Number of switches: 17

Switch position: 2 (either up or down)

The possible outcomes in the sample space can be determined by:

S=2^{17}=131072

The sample space includes 131072 possible codes.

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2 points) Sometimes a change of variable can be used to convert a differential equation y′=f(t,y) into a separable equation. One
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y'=(t+y)^2-1

Substituting u=t+y, yields u'=y', and

u'=u^2-1

which can be separated as

\dfrac{u'}{u^2-1}=1

Integrate both sides concerning t. For the left integral, split into partial fractions:

\dfrac{u'}2\left(\frac1{u-1}-\frac1{u+1}\right)=1

\displaystyle\int\frac{u'}2\left(\frac1{u-1}-\frac1{u+1}\right)\,\mathrm dt=\int\mathrm dt

\dfrac12(\ln|u-1|-\ln|u+1|)=t+C

Resolve for u:

\dfrac12\ln\left|\dfrac{u-1}{u+1}\right|=t+C

\ln\left|1-\dfrac2{u+1}\right|=2t+C

1-\dfrac2{u+1}=e^{2t+C}=Ce^{2t}

\dfrac2{u+1}=1-Ce^{2t}

\dfrac{u+1}2=\dfrac1{1-Ce^{2t}}

u=\dfrac2{1-Ce^{2t}}-1

Substitute u and determine y:

t+y=\dfrac2{1-Ce^{2t}}-1

y=\dfrac2{1-Ce^{2t}}-1-t

Utilize the given initial condition to find C:

y(3)=4\implies4=\dfrac2{1-Ce^6}-1-3\implies C=\dfrac3{4e^6}

concluding with the particular solution:

y=\dfrac2{1-\frac34e^{2t-6}}-1-t=\boxed{\dfrac8{4-3e^{2t-6}}-1-t}

3 0
3 months ago
Dorrian graphed the distance, y, traveled by 2 bikes in x seconds. If the two bikes are racing a distance of 100 feet, which bik
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Response:

The bike positioned higher on the y-axis is the one that has traveled a greater distance.

Step-by-step explanation:

If Dorrian charted the positions of the bikes with time in seconds on the x-axis and distance traveled on the y-axis, the x-coordinates for both bikes would align.

However, the bike that finished faster would achieve a higher y-coordinate, while the slower one trail behind with a lower y-coordinate.

Thus, the bike with the higher y-coordinate is the victor of the race.

6 0
2 months ago
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Charlie bought a pair of shorts at the store when they were having a 45% off sale. If the regular price of the pair of shorts wa
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Response:

$13.20

Detailed Explanation:

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3 months ago
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What is the total cost of an item priced $4.95 if there is 5% sales tax?
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4.95 + 4.95 × 0.05 = 5.20
$5.20
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2 months ago
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