Find three consecutive even integers whose sum is 48

Can (2,3 and square root 10) be sides ona right triangle?

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?

Which one ? is the answer and how to find this answer