I have 7 base ten blocks. Some are units and some are rods. Their value is an even number between 30 and 40. Who am I?

Math each whole number with a rational,exponential expression

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents