The digit 7 is 1/10 the value of which digit in the number 8,793,021,694?

The digit 7 is 1/10 of the value of digit 8.  

Step-by-step explanation:

In a number, each digit as you move from right to left increases by a value of 10.  For instance as we start with the digit 4, this is the 'ones' place, or a value of 4.  The next digit to the left is 9 which is the 'tens' place, or a value of 90. When we move on to the digit of 6, which represents the 'hundreds' place, we have a value of 600.  We continue to move to the left increasing by a power of 10 each time.  The digit 7 in the number given represents the 'hundred million' value, while the digit 8 represents the 'billion' value.  When we divide those two values, we reach a reduced or simplified value of 1/10.

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.