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3 years ago

9

Please help me with this surds question.

1 answer:

noname [10]3 years ago

3 0

the answer is 0.2 or one fifths

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RIP OpenStudy ;(

klemol [59]

First note that $\frac{2^n+1}{2^{n+1}} = \frac{2^n}{2^{n+1}} + \frac{1}{2^{n+1}} = \frac{1}{2} + \frac{1}{2^{n+1}}$

If you take limit, then you have $\lim_{n \to \infty}( \frac{1}{2} + \frac{1}{2^{n+1}})= \lim_{n \to \infty}( \frac{1}{2}) +\lim_{n \to \infty}(\frac{1}{2^{n+1}})=\frac{1}{2} +0= \frac{1}{2}$

3 0

3 years ago

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dexar [7]

Answer:i would say 1

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

A drug company is testing a new drag which is supported to reduce blood pressure. From the nine people who are used as subjects,

Pie

Answer:

The 95% confidence interval for the mean change in blood pressure, $\bar{x}$ , is 1.744 < $\bar{x}$ < 2.816

Step-by-step explanation:

The parameters given are;

The number of people in the sample, n = 9

The average drop in blood pressure, $\bar{x}$ = 2.28 points

The standard deviation, σ = 0.82

The confidence level = 95%

The formula for confidence interval with a known mean is given as follows;

$CI=\bar{x}\pm z_{\alpha/2} \dfrac{\sigma}{\sqrt{n}}$

Where:

$z_{\alpha/2}$ = z - score at 95% confidence level = 1.96

We therefore have;

$CI=2.28 \pm 1.96 \times \dfrac{0.82}{\sqrt{9}}$

Which gives the 95% confidence interval for the mean change in pressure, $\bar{x}$ , is given as follows;

1.744 < $\bar{x}$ < 2.816

6 0

3 years ago

Write an expression that represents the product of a variable and a negative number

lbvjy [14]

-6x because this expression represents the product of a negative number (-6) and a variable (x).

4 0

3 years ago

Jennifer is flying a kite. She is looking up at the kite at an angle of elevation of 39º. If the hand that is holding the kite s

inn [45]

See attachment for answer.

5 0

2 years ago