400 british pounds is equivalent to 620 us dollars how many us dollars will you receive for 2 british pound?

What is the range of the data below? .8090100

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.