A school district is planning on buying new desks for its classrooms. Each secondary classroom is to have 10 more desks than an elemenatry classroom. For 20 elementary classrooms and 25 secondary classrooms, a total of 1,115 desks are needed.

1. Write a system of equations that represents the information mentioned above.

2. How many desks are to be in each SECONDARY CLASSROOM?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?