I NEED HELP ASAP Subtract using the number line. −1−(−6) A number line ranging from negative eight to positive eight, with increments of one unit. Enter your answer in the box.

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?

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.

Ms.lopez has 4 liters of chemicals that she is going to pour into beakers. each beaker will have 1/4 of a liter of chemicals, how many beakers can ms.lopez fill? draw a model to support your work. (it's ok if you dont)