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meriva
3 years ago
6

What type of sampling is this:

Mathematics
1 answer:
PIT_PIT [208]3 years ago
7 0
This kind of sampling is called the Cluster sampling. The cluster sampling method is done by dividing the population by groups called clusters. There will be an equal number of samples drawn from each cluster using simple random sampling. In here, the population are the students which are divided into clusters - by year level. 15 students will be selected from each cluster. 
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Len [333]
Because 60 seconds= 1 minute and then 120 seconds=2 minutes, u multiply 10 ×12 to get to 120 seconds and then u multiply 4×12 which equals the answer which is 48.
7 0
3 years ago
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Brittany spent 68 hours in an 8-week period doing homework. what is the rate for the number of hours to the number of weeks
Amanda [17]

Answer: C- 17 hrs /2 weeks

Step-by-step explanation:

Write the number of hours in the numerator and the number of weeks in the denominator.

68 hrs/8 weeks

Simplify by dividing 4 into both the numerator and denominator.

68/8 = 17/2

8 0
3 years ago
What is the appropriate distance between the points (-3,4) and (-8,1) on a coordinate grid ?
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The answer will be 11.40 Units
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4 years ago
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If I Had A Hammer Hardware has sales of $5000 in its first month. Suppose sales were to increase by 4% every month. In how many
mixer [17]

After 14 months after the first month would the sales reach $9000

For given question,

A Hammer Hardware has sales of $5000 in its first month.

The sales were to increase by 4% every month.

We need to find the number of months after the first month would the sales reach $9000

Let the exponential function for sales is,

f(n)= a (1 + r)^{n}

where, n is the number of months

a is the sales of the first month

r is the rate of increment

So, a = $5000, r = 0.04, f(n) = $9000

Substitute values in above equation.

⇒ 9000 = 5000 × (1 + 0.04)^{n}

Solve above equation for n.

⇒ 1.8 = (1.04)^n

⇒ n = log_{1.04}^{(1.8)}

⇒ n = 14.9

⇒ n ≈ 15

Therefore, after 14 months after the first month would the sales reach $9000

Learn more about the exponential growth here:

brainly.com/question/11487261

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3 0
1 year ago
If you invest $8,600 at a 3 95% simple annual interest rate, approximately how long will it take for you to have a toad of $21,0
Mariana [72]

Answer:

37 years.

Step-by-step explanation:

Interest = PRT/100  where P = Initial Amount, R = rate, T = the time.

So we have the equation:-

8600 + 8600*3.95 * T / 100 = 21000

8600 + 33970T / 100 = 21,000

8600 + 339.7T  = 21000

339.7T = 21000 - 8600

T =  (21000 - 8600) / 339.7

T =  36.5 years



5 0
3 years ago
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