There are 4 semi-trailer trucks parked in a line at the rest stop. after the first truck, each truck in the line weighs 2 tons more than the truck before it. the trucks weigh a total of 32 tons. how many pounds does each truck weigh?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Interpret the following expression (5y^2-7)^3/(2y)^2

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?