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kotegsom [21]
3 years ago
11

Which of the following is the solution to the differential equation....

Mathematics
1 answer:
bixtya [17]3 years ago
4 0

Answer:

B

Step-by-step explanation:

\frac{dy}{dx}= (x-2)(y-2)\\ y>2\\\frac{dy}{y-2}=(x-2)dx\\

integrate both side

<h2>∫\frac{dy}{y-2}=∫(x-2)dx\\</h2><h2>ln(y-2)=\frac{(x-2)^2}{2} +C\\</h2><h3>Substitute y(4)=5</h3><h3>ln3=2+C\\C=ln3-2</h3><h3>ln(y-2)=\frac{(x-2)^2}{2} +ln(3)-2\\y-2=e^{\frac{(x-2)^2}{2} +ln(3)-2}\\y=2+3e^{\frac{x^2}{2}-2x }</h3><h3 />
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Which of the following items is the most likely to have a mass of 3 mg?
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C.the ant would be the most likely thing to have a mass of three grams.
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3 years ago
Two college roommates have each committed to donating to charity each week for the next year. The roommates’ weekly incomes are
schepotkina [342]

Answer:

C. 5 weeks.

Step-by-step explanation:

In this question we have a random variable that is equal to the sum of two normal-distributed random variables.

If we have two random variables X and Y, both normally distributed, the sum will have this properties:

S=X+Y\\\\\ \mu_S=\mu_X+\mu_Y=30+60=90\\\\\sigma_S=\sqrt{\sigma_X^2+\sigma_Y^2}=\sqrt{10^2+20^2}=\sqrt{100+400}=\sqrt{500}=22.36

To calculate the expected weeks that the donation exceeds $120, first we can calculate the probability of S>120:

z=\frac{S-\mu_S}{\sigma_S} =\frac{120-90}{22.36}=\frac{30}{22.36}=1.34\\\\P(S>120)=P(z>1.34)=0.09012

The expected weeks can be calculated as the product of the number of weeks in the year (52) and this probability:

E=\#weeks*P(S>120)=52*0.09012=4.68

The nearest answer is C. 5 weeks.

6 0
3 years ago
Help me with number 11 please
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Cooling towers are used to remove or expel heat from a process. A cooling tower's walls are modeled by x squared over 324 minus
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<h3>How to calculate the width?</h3>

From the information given, the towers walls are modeled by x²/324 - (y² - 90)²/1600.

Therefore, the width of the cooling tower at the base of the structure will be:

= 2 × ✓324

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In conclusion, the width is 36 meters.

Learn more about width on:

brainly.com/question/25855344

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Please refer to the above attachment

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