To empty the pool, you need to lower the water level by 150cm. since you can only lower it by 30cm every 2 hours (also same as 15 cm per hour), that means it will take you 10 hours.
150cm*(2 hours)/(30cm) = 150*(1/15) = 150/15 = 10.
6 a.m. + 10 hours = 4 p.m.
So the answer is C.) 4 p.m.
700,000 is x of 70,000
700,000=x times 70,000
divide both sides by 70,000
10=x
answer is 10 times
For each part A through D below, the idea is to find the common factor between the terms, which you'll then use the distributive property to pull out.
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Part A
3x + 18 = 3(x+6)
Note how we pulled out a 3. If we distribute it back in, we end up with 3x+18 again. The other problems are done in a similar fashion
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Part B
2x - 14 = 2(x - 7)
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Part C
6x + 4 = 2(3x + 2)
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Part D
9x - 15 = 3(3x - 5)
Answer:
Convenience sampling
Step-by-step explanation:
Convenience sampling is a type of non-probability sampling method that is used base on the ease of access to subjects or people. The only criteria is whether the participants agree to participate. It is the most commonly used sampling technique because it is readily available, easy to access, prompt, uncomplicated, and economical. Although it is not often recommended for research because of sampling error possibility and lack of representation of population. Examples of convenience sampling are sharing flyers of upcoming events or promotion in a shopping mall, asking people to answer questions in a store, online and offline survey and collecting market research data from a conveniently available pool of respondents.
Considering, Upper A magazine asks its readers to call in their opinion regarding the quality of the articles is a convenient way of collecting market research data from available readers who may agree to participate. Therefore, the sampling is a convenience sampling.
