0
I think 105.
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∙ 11y ago
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How many 9s in 81?
Nine of them
How do you write the decimal between 1407.92 and 1407.93?
It is any one of infinitely many numbers of the form 1407.92nnn where nnn... is any string of digits other than all 0s or all 9s.
How many 9s in 630?
79
Do rational numbers have a repeating decimal?
They can. And if you include repeating 0s and repeating 9s, then all rational numbers can be written with infinitely long repeating digits.
How many 9s are there between 1 and 100?
Eleven.
How many strings or three decimal digits have exactly two digits that are 9s?
There are 27 of them.
How many strings of three the same digits have exactly three digits that are 9s?
Only 1 exists, and it is "999"
Are repeating decimals an irrational number?
A repeating decimal is a rational number. Its value is(the repeating set of digits)/(as many 9s as there are digits above).
How would you write a decimal that less than 5 ten-thousandths?
The first 4 digits after the decimal point must be zero and the next digit must be 4 or smaller. If it is 4, then the subsequent digits cannot be a sequence of repeating 9s.
Is -0.436558509... rational number?
The answer depends on what the ellipses represent. If it is repeating 9s then it is. If it means that the string of digits goes on but with no repeating pattern then it is not.
How do you write 0.81 repeating as a fraction in simplest form?
Write the repeating digits over the same number of 9s and simplify: 0.81... has two repeating digits ⇒ the denominator has two 9s, ie 99. ⇒ 0.81... = 81/99 = 9/11
How many 3's and 9's are in the first million digits of pi?
There are 70,674 3's in the first million digits of pi. * * * * * There are 100,230 3s and 100,106 9s. Since the decimal representation of pi is essentially random, the number of times any digit appears should be approximately 10% of the total number of digits. So, for a million digits, there should be around 100,000 of any digit so it should have been immediately apparent that the previous answer was extremely unlikely. In fact it was incorrect to a very large degree!
How many 9s are in 45?
5
How many 9s are in 72?
8
How many 9s in 81?
Nine of them
How do you write the decimal between 1407.92 and 1407.93?
It is any one of infinitely many numbers of the form 1407.92nnn where nnn... is any string of digits other than all 0s or all 9s.
How many 9s in 630?
79
