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3 years ago

Simplify the quotient. Write the answer in sn.

Mathematics

1 answer:

gulaghasi [49]3 years ago

6 0

Answer: 2.25 x 10 -7 -7 is the exponent

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10 If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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Suppose on a certain test, fifty students earn a perfect score and fifty students earn a zero. determine the mean grade and stan

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Answer:

Mean=50.

standard deviation=50.

Step-by-step explanation:

Let the perfect score be 100.

The mean(average) of a data is given by: $Mean=\frac{sum of data points}{number of data points}$

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so, sum of data points=50×100+50×0=5000.

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Here if 50 is subtracted from each entry the new entry will have 50 entries as '50' and 50 entries as '-50'.

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4 years ago

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In the year 2002, the world population was estimated at 6 billion people. Based on research from the World Bank, about 20% lived

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In the given question all the information's are provided based on which the answer to the question can be easily deduced. It is already given that the population of the world in the year 2002 was estimated to about 6 billion. Among them 20% of the people lived on an an income of less that $1 per day.Firstly let us convert 6 billion from words to numbers.
6 billion = 6000000000
Now
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= 6000000000/5
= 1200000000
So the number of people earning less than $1 per day is 1200000000

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