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aniked [119]
3 years ago
9

Find the sum of the series using the formula

Mathematics
1 answer:
Gnom [1K]3 years ago
8 0

Answer:

We have a1 = 27 and r = 3 (because 27:9 = 3; 9:3 = 3; 3:3 = 1);

Then s = 27 / (1 - 3) ;

Finally, s = - 27 / 2;

Step-by-step explanation:

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Eden opened a credit card at a department store with an APR of 19.07% compounded monthly. What is the APY on this credit card?
notsponge [240]

APR = Annual Percentage Rate; APY = Annual Percentage Yield.
This is a tough question!!

To get the APY we use the compounding formula (A = P(1+r/n)^nt) and put $1 in for the principal and see what our final amount is at 19.07% after a year.

A = 1(1+.1907/12)^12

A= 1.0159^12

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6 0
4 years ago
Suppose a student carrying a flu virus returns to an isolated college campus of 2000 students. Determine a differential equation
ad-work [718]

Answer:

x(t) = 2000 - e^(-k*t)

Step-by-step explanation:

Interpretation:

No . infected student = x

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rate of infected students = dx / dt

not-infected student = 200 - x

The general rate at which student are infected can be expressed as below:

dx / dt = k * ( 2000 - x )

To develop an expression of x(t) we integrate the above expression by separating variables:

dx / (2000 - x ) = k * dt

Now integrate:

\int\limits{\frac{1}{(2000-x)} } \, dx = k *  \int\limits{dt}\\\\- ln (2000-x) = k*t + C\\\\

@ t = 0 , infected students x = 0

Hence,

C = - ln (2000)

- ln (2000-x) = k*t + - ln (2000)\\\\ln (\frac{2000-x}{2000}) = -k*t\\\\ 2000 - x = e^(-kt)\\\\x(t) = 2000 - e ^ (-k*t)

6 0
3 years ago
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9 months,
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