Jim and Alvin have a total of 360 pokemon cards. The ratio of the number of Jim's cards to the number of Alvin's cards is 7:2 Alvin buys some cards for Jim. The ratio of the number of Jim's cards to the number of Alvin's cards is now 7:5 How many cards does Alvin buy from Jim

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Your best friend told you that last week scientists disco y that las vegas is responsible for abrupt climate changes. which do you think is best way to research that recent discovery? an encyclopedia usgs internet site a book in the library your best friend’s parents for your ! ❤️

Plzzz answer both questions and i will give you 100 points