All categories

2 years ago

Find the population density round to the nearest tenth

1 answer:

5 0

In order to accomplish that trick, we would need two pieces
of information that you haven't given us:

1). The area you're interested in

2). The population inside that area

With that information, the population density is

(population in the area) divided by (the area of the area) .

You might be interested in

Please do in full working out

TiliK225 [7]

Answer:

0.09022

Step-by-step explanation:

this is basically about knowing how far to move the decimal point.

the decimal point is moved 4 places plus one place = 5 places to the left. so in the answer (9022) you must simply move the decimal place 5 to the left:

0.09022

4 0

2 years ago

4) Get Fit Headquarters charges $40 per month and $3 per exercise class. Fit Planet

Allisa [31]

Answer:

After 4 exercise classes, the monthly cost will be the same at each gym

The cost will be $52

Step-by-step explanation:

Assume that the number of the exercise classes is x

∵ Get Fit Headquarters charges $40 per month and $3 per exercise class

∵ The number of the exercise classes is x

→ Add $40 to the product of x and $3 to get the monthly cost

∴ The monthly cost of Get Fit = 3x + 40

∵ Fit Planet charges $20 per month and $8 per exercise class

∵ The number of the exercise classes is x

→ Add $20 to the product of x and $8 to get the monthly cost

∴ The monthly cost of Fit Planet = 8x + 20

∵ They have the same monthly cost

→ Equate their monthly cost to find x

∴ 8x + 20 = 3x + 40

→ Subtract 3x from both sides

∵ 8x - 3x + 20 = 3x - 3x + 40

∴ 5x + 20 = 40

→ Subtract 20 from both sides

∵ 5x + 20 - 20 = 40 - 20

∴ 5x = 20

→ Divide both sides by 5

∴ x = 4

∵ x is the number of the exercise classes

∴ After 4 exercise classes the monthly cost will be the same at each gym

→ Substitute the value of x in one of the monthly cost to get it

∵ The monthly cost of the Get Fit = 3(4) + 40

∴ The monthly cost of the Get Fit = 12 +40

∴ The monthly cost of the Get Fit = 52

∴ The cost will be $52

6 0

2 years ago

A used motorcycle can be purchased for $500 cash or on credit with a $200 down payment plus payments of $70 per month for 5 mont

Hoochie [10]

In cash =$500
In credit =$200+5($70)
= $200+350
= $550
So 550-500
=$50

6 0

2 years ago

The height of the cylinder portion is 12 mm and the overall height is 18 mm.

sasho [114]

Answer:

Step-by-step explanation:

5 0

2 years ago

Suppose heights of seasonal pine saplings are normally distributed and have a known population standard deviation of 17 millimet

Dmitry [639]

Answer:

The 90% confidence interval for the population mean is (300.78, 315.22).

Step-by-step explanation:

We have to calculate a 90% confidence interval for the mean.

The population standard deviation is know and is σ=17.

The sample mean is M=308.

The sample size is N=15.

As σ is known, the standard error of the mean (σM) is calculated as:

$\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{17}{\sqrt{15}}=\dfrac{17}{3.873}=4.389$

The z-value for a 90% confidence interval is z=1.645.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_M=1.645 \cdot 4.389=7.22$

Then, the lower and upper bounds of the confidence interval are:

$LL=M-t \cdot s_M = 308-7.22=300.78\\\\UL=M+t \cdot s_M = 308+7.22=315.22$

The 90% confidence interval for the population mean is (300.78, 315.22).

5 0

2 years ago