on the richter scale , which measures the total amount of energy released during an earthquake , a reading of x - 1 indicates one - tenth the released energy as is indicated by a reading of x . on that scale , the frequency corresponding to a reading of 7 is how many times as great as the frequency corresponding to a reading of 5 ?
"if richter scale reading goes from x - 1 to x it will be 10 if richter scale reading goes from 5 to 6 it will be 10 similarly if richter scale reading goes from 6 to 7 it will be 10 so it will from 5 to 7 i . e 6,7 = 10 * 10 = 10 ^ 2 answer is a"
power(const_10, subtract(7, 5))