Find the locus of a point
its distanceis 4 units from the point (4, -2)

Which of the following circles have their centers on the x-axis? check all that apply.

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

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?