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zvonat [6]
3 years ago
13

Write a formula to find the nth term of a geometric sequence -1/3,1/2,-3/4,9/8​

Mathematics
1 answer:
podryga [215]3 years ago
4 0

Answer:

Step-by-step explanation:

first term a = -1/3

Ratio r = 1/2÷ (-1/3) = 1/2 * (-3/1) =  -3/2

nth term = ar^(n-1)

=(-1/3)*(-3/2)^(n-1)

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A number decreased by 6 gives twice the number
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I think it's 4

Step-by-step explanation:

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Since it says m1 is 120 and it says find m3 don’t you need to multiply or I’m wrong
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A ticket for a school musical is $12. There is a 5% transaction fee if the ticket is purchased online. What is the total cost of
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So 10% of 12=1.2 divided by

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3 years ago
The prism shown has a volume of 798 cm3.
a_sh-v [17]

Answer:

10.5 cm

Step-by-step explanation:

Volume = base area × height

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4 0
3 years ago
In a study of the impact of smoking on birth weight, researchers analyze birth weights (in grams) for babies born to 189 women w
kompoz [17]

Answer:

c. Smoking is associated with lower birth weights. When smokers are compared to nonsmokers, we are 95% confident that the mean weight of babies born to nonsmokers will be between 76.5 grams to 486.9 grams more than the mean birth weight of babies born to smokers.

Step-by-step explanation:

The difference in mean birth weights (nonsmokers minus smokers) is 281.7 grams with a margin of error of 205.2 grams with 95% confidence.

Then, we know that the 95% confidence interval is (76.5, 486.9)

LL=M-MOE=281.7-205.2=76.5\\\\UL=M-MOE=281.7+205.2=486.9

<em>a. We are 95% confident that smoking causes lower birth weights by an average of between 76.5 grams to 486.9 grams.</em>

False, it interprets the confidence interval as a probability for individual cases. The confidence interval is a range for the population mean.

<em>b. There is a 95% chance that if a woman smokes during pregnancy her baby will weigh between 76.5 grams to 486.9 grams less than if she did not smoke.</em>

False, it interprets the confidence interval as a probability for individual cases. The confidence interval is a range for the population mean.

<em>c. Smoking is associated with lower birth weights. When smokers are compared to nonsmokers, we are 95% confident that the mean weight of babies born to nonsmokers will be between 76.5 grams to 486.9 grams more than the mean birth weight of babies born to smokers.</em>

True.

<em>d. With such a large margin of error, this study does not suggest that there is a difference in mean birth weights when we compare smokers to nonsmokers.</em>

There is enough evidence, as the lower bound of the confidence is positive. This means that there is only a probability of 0.05/2=0.025 that the true mean weight difference is smaller than 76.5 grams.

6 0
3 years ago
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