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Nadya [2.5K]
3 years ago
14

Write 39/40 as a decimal

Mathematics
2 answers:
malfutka [58]3 years ago
8 0
First you divide 39/40
you would get 0.975
Studentka2010 [4]3 years ago
6 0

Answer:

Given: The fraction \frac{39}{40}

The decimal forms of rational number either end or repeat a pattern.

To convert the given  fractions to decimals you just divide the top by the bottom or divide the numerator by the denominator.

If the division does not come out, you can stop after a certain number of decimal places and round off that number.

Convert a fraction to decimal :

\frac{39}{40} =0.975

Since fraction and decimal represent the same things because numbers are not whole numbers.


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A pile of newspaper was 17 3/4 inches high. Each consecutive week for the next 5 weeks the height of pile increase by 8 7/12 inc
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Answer: the height in inches, of the pile after 3 weeks is 34 11/12 inches

Step-by-step explanation:

Each consecutive week for the next 5 weeks the height of pile increase by 8 7/12 inches. Converting 8 7/12 inches to improper fraction, it becomes 103/12 inches. The height is increasing in an arithmetic progression. The formula for determining the nth term of an arithmetic sequence is expressed as

Tn = a + (n - 1)d

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d represents the common difference.

n represents the number of terms in the sequence.

From the information given,

a = 17 3/4= 71/4 inches

d = 103/12 inches

n = 3 weeks

the height in inches, of the pile after 3 weeks, T3. Therefore,

T3 = 71/4 + (3 - 1)103/12

T3 = 71/4 + 2 × 103/12 = 71/4 + 103/6

T3 = 419/12 inches = 34 11/12 inches

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Dr. Jane is studying the growing population of a species of jellyfish in a body of water. Each year, she records the population
olya-2409 [2.1K]

Answer:

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Second Year : 15x4=60

Third Year : 60x4=240

Fourth Year : 240x4=960

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Seventh Year : 15360x4 = 61440

Eighth Year: 61440x4=245760

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Tpy6a [65]

Answer:

option A. 21 sec

Step-by-step explanation:

Speed = the distance over the time

Given:

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2 = 42/t

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The answer is option A. 21 sec

7 0
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