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3 years ago

Use the picture for the question and the answer choices:)

Mathematics

1 answer:

Orlov [11]3 years ago

8 0

Parenthesis first 5-2=3.

7^2=49

-3*3=-9

49-9=40.

A is your answer.

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gayaneshka [121]

Out of the three options the first one is the right answer with the given numbers

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3 years ago

As the time___, the water___

Tasya [4]

Answer:

As time increases water decreases

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3 years ago

Convert 2/5 into a percent. a 25% b 40% c 50% d 52%

Lady_Fox [76]

Answer: B. 40%

~hope this helps!~

Step-by-step explanation:

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3 years ago

Read 2 more answers

jake spends 2 hours on each homework assignment and he had 3 assignments each day.orlando spend 2 hiurs on each homework assignm

Andrej [43]

Ok so u have to multiply for this one

Work *Jake*:

So he spends 2 hours on each assignment. He has 3 assignments so u have to do :
2*3=6
He spend 6 hours a day doing home work so now u have to multiply that by 30:
6*30=180

Work *Orlando*:

So he spends 2 hours on each homework. He has 2 sheets each do so u have to multiply 2 and 2:
2*2=4

He spends 4 hours a day doing homwork so u have to multiply it by 30:
4*30=120

Answer:

So Jake spends 130 hours
Orlando spends 120 hours

Add both together:
120+130=250

They spend 250 hours together on work in 30 days/

4 0

3 years ago

Read 2 more answers

In response to a survey question about the number of hours daily spent watching TV, the responses by the eight subjects who iden

Basile [38]

Answer:

a) $\bar X = \frac{2+2+1+3+1+0+4+1}{8}= 1.75$

b) The margin of error indicates we can be 95%confident that the sample mean falls within 0.89 of the population mean

Step-by-step explanation:

Part a

The best point of estimate for the population mean is the sample mean given by:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

Since is an unbiased estimator $E(\bar X) = \mu$

Data given: 2 , 2 , 1 , 3 , 1 , 0 , 4 , 1

So for this case the sample mean would be:

$\bar X = \frac{2+2+1+3+1+0+4+1}{8}= 1.75$

Part b

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample