exam Maths Puzzle Numerical Ability

The Colombia earthquake of 1906 had an intensity of I = 398,107,000. What did it measure on the Richter scale?

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exam Other Question

The difference of two numbers is three. The larger number is 33 minus twice the smaller number. What are the numbers? use the given conditions to write an equation for the line in slope-intercept form

passing thru (2,2) and perpendicular to the line whose equations is y= -1/16+3