How many times larger than 0.005 is 0.625

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?

How many and of which kind of roots does the equation f(x)=x3−x2−x+1

What is 140 squared pleas me i am dumb