Chemical company makes two brands of antifreeze. the first brand is
60%
pure antifreeze, and the second brand is
85%
pure antifreeze. in order to obtain
140
gallons of a mixture that contains
70%
pure antifreeze, how many gallons of each brand of antifreeze must be used?

615,000

Step-by-step explanation:

Given that:

Whole number rounded to the nearest ten thousand is 620,000

Let x = the whole number

HTh__ TTh Th H T U

6 2 0 0 0 0

The ten thousand digit is 0 ;

To round to the nearest 10 thousand, the thousand digit is rounded up to 1 and added to the ten thousand digit if it up to 5 or above and rounded down to 0 if below 5 with all subsequent digits(hundred, tens and unit) rounded to Zero..

Hence,

The whole number will could be range between :

615,000 - 619,999

Hence, the least possible value for the number is 615,000.