4 years ago

Jack has 80 marbles.

Mathematics

2 answers:

ivolga24 [154]4 years ago

7 0

Answer:

he has 64 marbles now

Step-by-step explanation:

Sergio039 [100]4 years ago

6 0

Answer:

64 marbles

Step-by-step explanation:

1/5 = x/80

cross multiply

5 × x = 1 × 80

5x = 80

divide both sides by 5

x = 16

80 - 16

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3 years ago

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6 6
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4 years ago

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3 years ago

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geniusboy [140]

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3 years ago

A survey finds that 55 people out of 170 favor increasing property taxes to help pay for a new library. If this data is used to

Aloiza [94]

Answer: B. 0.036

Step-by-step explanation:

Formula for standard error :

$SE=\sqrt{\dfrac{p(1-p)}{n}}$

, where p = Population proportion and n= sample size.

Let p be the population proportion of the people who favor new taxes.

As per given , we have

n= 170

$p=\dfrac{55}{170}\approx0.324$

Substitute these values in the formula, we get

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Hence, the standard error of the estimate is 0.036.

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4 years ago