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Mathematics

1 answer:

polet [3.4K]3 years ago

8 0

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Write each percent as a fraction as a decimal.<br> 1. 222% 2. 0.9%

andrew-mc [135]

Answer:

222/100

9/1000

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3 years ago

Divide 72 in the ratio 3:4:5

ziro4ka [17]

Answer:

Total number of parts = 3 + 4 + 5. = 12 parts. Each part = 72 ÷ 12.

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2 years ago

Read 2 more answers

You collect pennies. you start with one penny and double the number of pennies you have each day for the next 27 days. how many

Rudik [331]

Imagine, at the first day you have only one penny. Then tomorrow you have 2 pennies, next day you have 4 (2x2), next day you have 8 (4x2), next day you have 16 (8x2).... and so forth.

It looks like geometric sequence isn't it? (the ratio between the number of pennies that you have from the 2nd day and the 1st day is 2)

So, by using geometric sequence theorem we can total those pennies until day-27

S (total pennies at day-27) = (1)(2^27-1) / 2-1 = 2^26 pennies

So, you have 2^26 pennies.. a big number of pennies huh?=))

{The formula is: S = a( r^n-1) / r-1
Where:
a= the number of pennies that you've got at the 1st day
n= number of days you spent to collect those pennies)
r= the ratio of the number of pennies}

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3 years ago

Where can you buy a calculator that does math fractions?

Zarrin [17]

Target or Walmart or maybe staples

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4 years ago

Weight of a rock: In a geology course, students are learning to use a balance scale to accurately weigh rocks. One student plans

dusya [7]

Answer:

The first student, with 20 measurements, will have the more precise interval due to the larger sample size.

Step-by-step explanation:

Margin of error of a confidence interval:

The margin of error of a confidence interval has the following format:

$M = z\frac{s}{\sqrt{n}}$

In which z is related to the confidence level, s to the standard deviation and n to the sample size.

The margin of error is inversely proportional to the square root of the sample size, which means that a larger sample will lead to a lower margin of error, that is, to a more precise interval.

In this question:

One student will use 5 measurements, other 20. The first student, with 20 measurements, will have the more precise interval due to the larger sample size.

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3 years ago