5) An earthquake had an intensity 10^6 times more powerful than a reference level earthquake, or 10^6*Io. What was the magnitude of this earthquake on the Richter scale?
The magnitude on the Richter scale of an earthquake of intensity I is log10(I/10).

Given the conditional statement, match the following. conditional statement: if two lines intersect, then their intersection is one point.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.