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3 years ago

Find the sum of the infinite geometric series calculator

1 answer:

4 0

Unsure of what you want here!

The formula for the sum of an infinite series is

a
S = ------ where a is the first term and r is the common ratio. Note
1-r that the magnitude of the common ratio, r, must be <1.

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu

iVinArrow [24]

Answer:

$-0.061 < P_1 -P_2< 0.025$

Step-by-step explanation:

Give data:

$n_1 = 350$

$n_2 =250$

$x_1 = 23$

$x_2 = 21$

$\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066$

$\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084$

for 95% confidence interval

$\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025$

$z_{\alpha/2} = 1.96$ from standard z- table

confidence interval for P_1 and P_2 is

$\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}$

$(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}$

$-0.018 \pm 0.043$

confidence interval is

$-0.018 - 0.043 < P_1 -P_2$

$-0.061 < P_1 -P_2< 0.025$

7 0

3 years ago

What is the surface area of the prism in square inches?

RUDIKE [14]

<h2>add 60+168+276+304 and you get 810 square inches then add 3+14+8 and equals 835.</h2>

7 0

2 years ago

Rewrite 26/4 as a mixed number in simplest form.

dimulka [17.4K]

4 goes into 26 6 times with a remainder of 2.

26 ÷ 4 = 6 2/4

6 2/4 = 6 1/2

Your answer is 6 1/2

3 0

3 years ago

3/10 divided by -1/3

Snezhnost [94]

Answer:

-9/10

Step-by-step explanation:

Find the LCM of 10 and 3: 30
Alter the numerators to fit the denominators: 3 × 3 = 9, -1 × 10 = -10
Re-write the fractions: 9/30 ÷ -10/30
9/30 ÷ -10/30 = 9/30 × -30/10
9/30 × -30/10 = -270/300
$-\frac{270}{300} = -\frac{9}{10}$

I hope this helps!

8 0

3 years ago

If 84 people vote in an election which involves 3 candidates, what is the fewest number of votes a majority candidate can receiv

nikklg [1K]

Answer:

Step-by-step explanation:

hope this helped!!!!!!

3 0

3 years ago