Ross sells computers. he earns 6% of his sales in commission each month. in the past 4 months, ross had the following sales: $4000, $5200, $5500, $4900. find a reasonable range for his commissions during these months.

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Graph the equationy= x+3[tex]y = x + 3[/tex]

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”?