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Komok [63]
3 years ago
12

rory's older brother is saving to buy a used motorcycle that cost $3,550. he saves an equal amount of money each month for 6 mon

ths. about how much does he need to save each month to buy the motorcycle
Mathematics
2 answers:
boyakko [2]3 years ago
5 0
I think it’s just 591.66 cause u hav to divide 3550 by 6
Elena L [17]3 years ago
5 0

3550 divided by 6 months gives the amount of money he saves each month.

3550 divided by 6 = 591.66666666......

Round 591.666666 to $592 each month.

About $592 each month is the answer

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Katen [24]

Answer:

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

Step-by-step explanation:

Given

n = 200

x_1 = 34 -- City C

x_2 = 54 --- City K

Required

Determine the 90% confidence interval

This is calculated using:

CI = \bar x \± z\frac{\sigma}{\sqrt n}

Calculating \bar x

\bar x = \bar x_1 - \bar x_2

\bar x = \frac{x_1}{n} - \frac{x_2}{n}

\bar x = \frac{34}{200} - \frac{54}{200}

\bar x = 0.17 - 0.27

For a 90% confidence level, the ​z-score is 1.65.  So:

z = 1.65

Calculating the standard deviation \sigma

\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }

So:

\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }

\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}

So:

CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

7 0
2 years ago
PLZ HELP! A researcher wants to find out what brand of tomato sauce is most popular with people who work full-time. He samples s
arlik [135]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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8 0
2 years ago
X+(x+2)+(x+4)+(x+6)=4x+12=212
Mrac [35]

(x+(x+2)+(x+4)+(x+6))=4x+12=212

x+x+x+x(2+4+6)=4x+12=212

4x (2+4+6)=4x+12=212

4x(6+6)=4x+12=212

12+4x=4x+12=212

<u>-12            -12   -12</u>

4x=4x=200

<u>/4  /4  /4</u>

<u>x=x=50</u>

<u>x=50</u>

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2 years ago
Find each unit rate. 1 ¼ hours in 5 days.
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1 1/4 hrs       5/4 hrs

-----------  =  ---------------- = 1/4 hr per day

5 days        5 days

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