If the cost in health care went from $1,559.00 in 2002 to $3,585.70 in 2014 what is the percent change? Is it an increase or a decrease?

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?

Write the following as a base and exponent

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)