Round 63849 to the nearest ten, nearest hundred, to the nearest thousand and ten thousand

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5

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?