Solve.If an earthquake measured 8.3 on the Richter scale, what was the intensity of the earthquake in terms of I0? The magnitude on the Richter scale of an earthquake of intensity I is 
A. 4020? I0
B. 199,526,231 ? I0
C. 19,952,623? I0
D. 158,489,319? I0
Answer: B
Mathematics
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Solve the problem.The sum of a student's three scores is 217. If the first is 17 points more than the second, and the sum of the first two is 25 more than twice the third, what was the first score?
A. 47 points B. 64 points C. 68 points D. 85 points
Mathematics
Find the base. Round to the nearest hundredth unless otherwise indicated.15 is 5% of what number?
A. 30 B. 75 C. 3000 D. 300
Mathematics
Factor by grouping.20x6 - 25x3 - 12x3 + 15
A. (5x3 + 3)(4x3 + 5) B. (5x6 - 3)(4x - 5) C. (5x3 - 3)(4x3 - 5) D. (20x3 + 3)(x3 + 5)
Mathematics
Use mathematical induction to prove that the statement is true for every positive integer n.5n > 1
What will be an ideal response?
Mathematics