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2 years ago

A tutor chargers $30 for 2 hours.uae ratio table to determine how much she charges for 5 hours

Mathematics

2 answers:

Kazeer [188]2 years ago

5 0

$65 is how much she has to pay.

Daniel [21]2 years ago

4 0

15/hr 15x5 = 75 dollars. you can build the ratio table using the rate of change.

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A researcher examines 27 water samples for mercury concentration. The mean mercury concentration for the sample data is 0.097 cc

jonny [76]

Answer:

Step-by-step explanation:

Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Margin of error = z × s/√n

Where

s = sample standard deviation = 0.0074

n = number of samples = 27

From the information given, the population standard deviation is unknown and the sample size is small, hence, we would use the t distribution to find the z score

In order to use the t distribution, we would determine the degree of freedom, df for the sample.

df = n - 1 = 27 - 1 = 26

Since confidence level = 90% = 0.90, α = 1 - CL = 1 – 0.9 = 0.1

α/2 = 0.1/2 = 0.05

the area to the right of z0.05 is 0.05 and the area to the left of z0.05 is 1 - 0.05 = 0.95

Looking at the t distribution table,

z = 1.706

The critical value is 1.706

Margin of error = 1.706 × 0.0074√27

= 0.0024

The 90% confidence interval is

0.097 ± 0.0024

4 0

2 years ago

What is the answer to this problem 1/2=q 2/3?

Angelina_Jolie [31]

3/2 = 2q
q = 3/2 ÷ 2
q = 3/2 × 1/2
q = 3/4

6 0

3 years ago

Math help please!!!! will be marking brainly

zhuklara [117]

The answer is C. 3/5

20 girls, 3 boys. 23/40 is about 60 percent, or 3/5.

I wrote the wrong answer on accident for whatever reason when I first sent this, I apologize.

7 0

3 years ago

14) A blizzard produced 9 - inches of snow. The

Arisa [49]

Answer:

2 3/8 in.

Step-by-step explanation:

$9\frac{1}{2}-7\frac{1}{8}\\\\9\frac{4}{8}-7\frac{1}{8}\\\\2\frac{3}{8}$

5 0

2 years ago

BC has a midpoint at M(6, 6). Point C is at (2, 10). Find the coordinates of point B.

agasfer [191]

Answer:

The coordinates of B are (10,2)

Step-by-step explanation:

Hi there!

We know that BC has a midpoint M, with the coordinates (6,6), and the endpoint C, with coordinates (2, 10)

We want to find the coordinates of point B

The midpoint formula is $(\frac{x_1 + x_2}{2}, \frac{y_1+ y_2}{2})$ , where $(x_1, y_1)$ and $(x_2 , y_2)$ are points. In this case, the point C has the values of $(x_1, y_1)$ , and B has the values of $(x_2 , y_2)$