A store used a new video games. New video games cost more than used video games. Omar spent a total of $84 on 4 used video games and 2 new video games. Sally spent a total of $78 on 6 used games and 1 new video game. What is the cost of each used game?

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)