Use polynomial identities to multiply (5-4x3)(5+4x3)

Find the length of cu, the triangles are similar.

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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?