Teresa gave away 8 baseball cards and 4 baseball cards left. Write substraction problem to show the fraction of baseball cards Teresa has left

Find │–14│ a. 14 b. –14 c. start fraction 1 over 14 end fraction

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?

Multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2