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3 years ago

May someone please help me with question 6 and 7?

Mathematics

1 answer:

svetlana [45]3 years ago

5 0

Lowest wind chill temperature on Monday was 1/4(-36) = -9 F

The lakes initial level with respect of normal is -8 inches
New level after decreases = -8 - 1 1/4 - 2 3/8 = -11 5/8 inches.

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A suit costs $95. Barry has a discount coupon for 10% off and the city has a 4.5% sales tax. What is the final cost of the suit?

seropon [69]

So first you need to do the discount

(95)(0.9) = 85.5

then add the 4.5% sales tax:

(85.5)(1.045) = $89.35

7 0

3 years ago

A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120. The sampl

jeka94

Answer:

<h3>The standard error of the mean is <u>15</u></h3>

Step-by-step explanation:

Given that a simple random sample of 64 observations was taken from a large population.

Hence it can be written as n=64

The population standard deviation is 120.

It can be written as $\sigma_{\overline{X}}=120$

The sample mean was determined to be 320.

It can be written as $\overline{X}=\mu =320$

<h3>To find the standard error of the mean :</h3>

The formula for the standard error of the mean is given by

$\sigma_{\overline{X}}=\frac{\sigma}{\sqrt{n}}$

Now substitute the values in the formula we get

$\sigma_{\overline{X}}=\frac{120}{\sqrt{64}}$

$=\frac{120}{8}$

$=15$

$\sigma_{\overline{X}}=15$

<h3>∴ The standard error of the mean is 15</h3>

3 0

3 years ago

What is 8 to the 7th power

saveliy_v [14]

8 x 8 x 8 x 8 x 8 x 8 x 8
64 x 64 x 64 x 8
4096 x 512
=2 097 152

6 0

2 years ago

Every 7 years the Lancaster family has a family reunion. Every 6 years they update their family tree. If they both had a photo t

Nina [5.8K]

Answer:

In year 2039 both the events will happen again.

Step-by-step explanation:

We are given the following in the question:

Family reunion:

Every 7 year

Update the family tree:

Every 6 years

1997 was the year when they had a family reunion as well as they updated their family tree.

We have to find the year in which both the events will occur together.

We find the lowest common multiple of 7 and 6.

$L.C.M(7,6) = 7\times 6 = 42$

Thus, after 42 years both the event will happen again.

Year:

$1997 + 42 = 2039$

Thus, in year 2039 both the events will happen again.

3 0

3 years ago

A) What is the derivative of x^2 - 6x +36.

Aleks04 [339]

Answer:

2x-6

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers