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3 years ago

What is the probability that a random point is chosen on the grid below in the shaded area?

Mathematics

1 answer:

RSB [31]3 years ago

5 0

Answer:

17/25

Step-by-step explanation:

In this case we are asked for the probability that a random point is chosen in the lower grid in the shaded area, we must count the total number and amount of shaded squares.

In total there are 25 squares and 17 shaded ones.

This means that the answer is 17/25, the answer is not within the options, but if it is 8/25, which would be the probability of choosing a random point in a non-shaded or white area

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For a 95% confidence interval what would the sample size need to be as it's most conservative to have a 2% margin of error

aleksley [76]

Answer:

The size of the sample 'n' = 2401

Step-by-step explanation:

Step:1

Given that the margin of error = 2 % = 0.02

The margin of error is determined by

$M.E = \frac{Z_{0.05} \sqrt{p(1-p)} }{\sqrt{n} }$

we know that the proportion

$\sqrt{p(1-p)} < \frac{1}{2}$

Step:2

The margin of error is determined by

$0.02 = \frac{1.96( \frac{1}{2} ) }{\sqrt{n} }$

$\sqrt{n} = \frac{1.96}{2 X 0.02}$

√n = 49

Squaring on both sides, we get

n = 49 × 49

n = 2401

Final answer:-

The size of the sample 'n' = 2401

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3 years ago

What is the factored form of x2 - 4x - 5?

Kazeer [188]

Answer:

Option D, (x - 5)(x + 1)

Step-by-step explanation:

Step 1: Factor

$x^2 - 4x - 5$

$x^2 - 5x + x - 5$

$(x - 5)(x + 1)$

Answer: Option D, (x - 5)(x + 1)

6 0

3 years ago

Read 2 more answers

in thailand the population of town is 48700 men and 41600 women what percentage of the total percentage are men

Finger [1]

Answer:

53.931339977852% (you can round)

Step-by-step explanation:

You add up 48,700 and 41,600 and you would get 90,300 as the overall population. Then you would put it in fraction form if you want to convert it into a percentage. The fraction form would be 48,700/90,300. You could simplify it to 487/903. Then you do 487 x . You would cross multiply and get

___ = ___

903 100

903x = 48700. Then you would divide each side by 903 and get x = 53.931339977852% (you can round)

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3 years ago

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Find the perimeter and area of the semi circle

OLga [1]

Answer:

Step-by-step explanation:

Perimeter of a semicircle with diameter d = πd/2 + d

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