6
In the decimal system, 10 times.
There can only be one digit in each place value - before or after the decimal place.
Four.
The place value of each digit is b times the place value of the digit to its right where b is the base for the system: whether that is binary, octal, decimal, duodecimal, hexadecimal, sexagesimal or some other value.
The number 19.00 has 4 significant digits. When you place digits on both sides of a decimal point you are indicating that all the digits on both sides are significant, so when you write 19.00 what you are saying is the the value of the number is 19.00±0.005
Only one at a time.
ten (0-9).
15
In the decimal system, 10 times.
To find how many significant digits are being displayed, you look down the place values until finding the first non-zero value. In this case, the first non-zero value is the 1 in the hundredths place. The next step is simply to count every value after that to see how many significant digits the number has been taken to. In this case there are 3.
There can only be one digit in each place value - before or after the decimal place.
infinite number of digits after the decimal point -- pi does not have a finite value.
In the decimal place value system, each digit is ten times bigger than the digit on its right
1
Four.
In the decimal system, 10 times. In another system, where the base is x, it would be x times.
The place value of each digit is b times the place value of the digit to its right where b is the base for the system: whether that is binary, octal, decimal, duodecimal, hexadecimal, sexagesimal or some other value.