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2 years ago

Hurry what it 86,400 sec.=_______ days

Mathematics

2 answers:

DENIUS [597]2 years ago

8 0

Answer:

1 day

Step-by-step explanation:

(86,400 sec)*(1 minute/60 sec)*(1 hour/60 minutes)(1 day/24 hours) =<u> 1 day</u>

Kryger [21]2 years ago

7 0

It is not more than a day:D

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Solve the linear differential equation 2xy' + y = 2√x

77julia77 [94]

Answer:

Step-by-step explanation:

General form of the linear differential equation can be written as:

$\frac{dy}{dx}+P(x)y=Q(x)$

For this case, we can rewrite the equation as:

$\frac{dy}{dx}+\frac{1}{2x}y=\frac{\sqrt{x}}{x}$

Here $P(x) =\frac{1}{2x}; Q(x)=\frac{\sqrt{x}}{x}$

To find the solution (y(x)), we can use the integration factor method:

$Fy(x)=\int Q(x)Fdx+C \rightarrow F=e^{\int P(x)dx$

Then $F=e^{\int \frac{1}{2x}dx}=e^{\frac{1}{2}\ln|x|\right}=\sqrt{|x|}$

So, we can find:

$y\sqrt{|x|}=\int \frac{\sqrt{x}\sqrt{|x|}}{x}dx+C$

Suppose that $x\in \double R$ , then $\sqrt{|x|}=\sqrt{x}$ , and we find:

$y\sqrt{x}=x+C \rightarrow y(x)=\sqrt{x}+\frac{C\sqrt{x}}{x}$

To check our solution is right or not, put your y(x) back to the ODE:

$y' = \frac{1}{2\sqrt{x}}-\frac{C}{2\sqrt{x^{3}}}$

$2xy'=\frac{x-C}{\sqrt{x}}$

$2xy'+y=\frac{x-C}{\sqrt{x}}+\sqrt{x}+\frac{C\sqrt{x}}{x}=2\sqrt{x}$

(it means your solution is right)

3 0

2 years ago

Lani spent 15% of her 8 hour work day in meetings. How many minutes of her workday did she spend in meetings

Verizon [17]

72 minutes

convert 8 hours to minutes ⇒ =8 × 60 = 480 minutes

15% of 480 = 0.15 × 480 = 72 minutes

4 0

3 years ago

Read 2 more answers

A professor wants to estimate how many hours per week students study. A simple random sample of 78 students had a mean of 15.0 h

OleMash [197]

Answer:

interval=(15.085,14.9515)

Step-by-step explanation:

Table:

CI Z

85% 1.440

90% 1.645

95% 1.960

In order to find the interval/estimate of hours per week students study we consider the formula given below:

Interval=X± $\frac{Z*S}{\sqrt{n} }$

where:

X is the mean hours

Z is the value from Z distribution table of Confidence Interval

n is the sample size of students

S is the standard deviation

X=15, Z=1.645, S=2.3hours, n=78

Interval=15± $1.645*2.3/\sqrt{78}$

Interval=15±0.0485

interval=(15.085,14.9515)

7 0

3 years ago

What is the sum? 3/8 • (-3/6)

devlian [24]

Answer: The answer is -3/16

Step-by-step explanation: brainlest please

5 0

3 years ago

The Avengers movie is 3 hours 2 minutes long. If you watched ¾ of the movie, how much of the movie did you watch?

netineya [11]

You would’ve had to watch 136.5 minutes of the movie, I guess you can do the rest

6 0

3 years ago