A2-pound box of spaghetti costs $2.50 philip says the unit cost is 2/2.50=0.80 per pound explain his error

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?

If 20% of a number is 35, what is 50% of that number?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x