All categories

4 years ago

Answer this for me please?

Mathematics

2 answers:

Tresset [83]4 years ago

7 0

3. The rectangle you should draw should have side lengths of 8 and 4 since 4 x 8 = 32
4. formula for area is length x width so 4 x 9 = 36
5. formula for area is length x width so the opposite of multiplication is division, so the answer would be 27 divided by 9 = 3.

Nady [450]4 years ago

6 0

Draw a rectangle and make one side 16 and the other side 2

You might be interested in

Mrs. Nixon went to the store to buy candy for her

AnnyKZ [126]

Answer:

$2.25

Step-by-step explanation:

First, we (always) highlight key details. In this case, we would highlight that th candy is 90 cents per pound, and the she bought 2.5 pounds. Now, we just multiply 2.5 by .90, and boom! We get $2.25. Mrs. Nixon spent $2.25 (or two dollars and twenty-five cents) on candy bars.

8 0

3 years ago

ALGUIEN AYUDEME POR FAVOR :( TENGO QUE ENTREGARLO EN 15 MINUTOS

Serggg [28]

Creo que es A si no es porfavor dime.

6 0

3 years ago

Can somebody help me please

aleksklad [387]

Answer:

I think it's -2

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Required information An article presents a new method for timing traffic signals in heavily traveled intersections. The effectiv

Natasha2012 [34]

Answer:

$652.6-2.01\frac{311.7}{\sqrt{50}}=563.997$

$652.6+2.01\frac{311.7}{\sqrt{50}}=741.203$

So on this case the 95% confidence interval would be given by (563.997;741.203)

Step-by-step explanation:

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".

$\bar X=652.6$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=311.7 represent the sample standard deviation

n=50 represent the sample size

Soltuion to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=50-1=49$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,49)".And we see that $t_{\alpha/2}=2.01$