Carmella borrowed half as many cds from our library as her friend ariel. ariel borrowed 2 more than juan, but four less than her friend sierra. sierra borrowed 12 cds. how many did each person borrow?

Find the area of the unshaded square

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

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?