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4 years ago

9

The circle for India has a radius of 3.2 cm and the circle for China has a radius of 3.4 cm. If 17% of the world’s population is

in India, what percentage of the world’s population is in China?

1 answer:

defon4 years ago

8 0

World's population that lives in China in percentage is 20%

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You have 52 inches of yellow ribbon and 64 inches of red ribbon. You want to cut the ribbon into pieces of equal length with no

Tju [1.3M]

The greatest length is the gcf of 52 and 64.

52 = 2 x 2 x 13
64 = 2 x 2 x 2 x 2 x 2 x 2

gcf = 2 x 2 = 4

Therefore, the greatest length of the pieces that can be made = 4 inches

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3 years ago

A rectangle has a perimeter of (12+8y). If one side of the rectangle is (4x-2y), write an expression of the other side.

ziro4ka [17]

P = 2(l+w)

substitute for P and l

12+8y = 2 (4x-2y+w)

distribute

12+8y = 8x -4y +2w

solve for w

subtract 8x from each side

12 +8y -8x = -4y+2w

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3 years ago

Which set contains rational numbers?

neonofarm [45]

Rational numbers are any numbers that terminate (the decimal ends somewhere)

The only set that does this is D, since

$\sqrt{25} = 5$

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3 years ago

Question set 1: One instructor believes that students take more than 2 classes per quarter on average. He randomly interviewed a

Sveta_85 [38]

Answer:

There is statistical evidence at 95% level to claim that students attend more than 2 classes per quarter

Step-by-step explanation:

Given that one instructor believes that students take more than 2 classes per quarter on average. Let X be the no of classes students take.

$H_0: \bar x =2\\H_a: \bar x >2$

(Right tailed test at 5% significance level)

$\bar x =2,3 \\s = 0.8$

Mean difference = $2.3-2=0.3$

Std error = $\frac{0.8}{\sqrt{24} } \\=0.1633$

Test statistic t = mean diff/std error = 1.84

p value =0.039

Since p <0.05, we reject null hypothesis.

There is statistical evidence at 95% level to claim that students attend more than 2 classes per quarter

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4 years ago