How many square inches are in 60 ft.

Last year, the standard deviation of the ages of the students at UA was 1.8 years. Recently, a sample of 31 students had a stand

scZoUnD [109]

Answer: $H_0: \sigma=1.8$

Step-by-step explanation:

Let $\sigma$ represents the standard deviation .

Given : Last year, the standard deviation of the ages of the students at UA was 1.8 years.

The researcher are interested in testing to see if there has been a significant change in the standard deviation of the ages of the students at UA.

We know that the null hypothesis always contains the equal signs, then the null and alternative hypothesis is given by :-

$H_0: \sigma=1.8\\\\ H_a:\sigma\neq1.8$

8 0

3 years ago

Divide. 46 532 Enter your answer by filling in the boxes

Tju [1.3M]

Answer:

11.5652173913

Step-by-step explanation:

You might have to round

8 0

3 years ago

Which would be appropriate compatible numbers to use to estimate (19 4/5) (4/6) A. 16(1/3) B. 19(2/3) C. 20(1/2) D. 20(1)

podryga [215]

Answer:

C. 20(1/2)

Step-by-step explanation:

Let's find the value of the expression before looking for the nearest estimate

(19 4/5) (4/6) = 19 *(4/5)(4/6)

(19 4/5) (4/6) = 19(16/30)

(19 4/5) (4/6) = 19(8/15)

(19 4/5) (4/6) = (19*8)/15

(19 4/5) (4/6) = 152/15

(19 4/5) (4/6) = 10(2/15)

A. 16(1/3) =5.33

B. 19(2/3) = 12.667

C. 20(1/2) = 10

D. 20(1)= 20

The nearest to the expression is C. 20(1/2)

6 0

3 years ago

Work out the volume of this prism.

aniked [119]

Answer:

Volume = 175 cm³

Step-by-step explanation:

We can picture this image as a whole rectangular prism, with a part that has been cut out of it.

Step 1: Volume of original prism

We are going to solve the volume of the original prism, with the dimensions of 9, 7, and 5

V = 9 * 7 * 5
V = 315

Step 2: Volume of part cut out

We are solving the volume of that part that has been cut out ( missing space)

V = 5 * (9-2) * (7-3)
V = 5 * 7 * 4
V = 140

Step 3: Total Volume

Now we just subtract the cutout part from the original volume

315 - 140
V = 175

Volume = 175 cm³

Note, we could have also found the volume by splitting this shape into two prisms with dimensions (9 * 3 * 5) and (4 * 5 * 2). This way would also get us:

V = (9 * 3 * 5) + (4 * 5 * 2)
V = 135 + 40
V = 175

-Chetan K

7 0

2 years ago

The following table shows the estimated populations and annual growth rates for four countries in the year 2000. Find the expect

Softa [21]

Answer:

For Australia: 22,044,350

For China: 1,545,744,200

For Mexico: 145,507,500

For Zaire: 92,237,875

Step-by-step explanation:

For Australia: Population in 2000 is 19,169,000 and it is increasing steadily at a rate of 0.6% per year.

Therefore, the population in the year 2025 will be

$19169000[1+\frac{0.6 \times 25}{100} ]= 22,044,350$ (Answer)

For China: Population in 2000 is 1,261,832,000 and it is increasing steadily at a rate of 0.9% per year.

Therefore, the population in the year 2025 will be

$1261832000[1+\frac{0.9 \times 25}{100} ]= 1,545,744,200$ (Answer)

For Mexico: Population in 2000 is 100,350,000 and it is increasing steadily at a rate of 1.8% per year.

Therefore, the population in the year 2025 will be

$100350000[1+\frac{1.8 \times 25}{100} ]= 145,507,500$ (Answer)

For Zaire: Population in 2000 is 51,965,000 and it is increasing steadily at a rate of 3.1% per year.

Therefore, the population in the year 2025 will be

$51965000[1+\frac{3.1 \times 25}{100} ]= 92,237,875$ (Answer)

5 0

3 years ago