Una cartera contiene $8.90 en pesetas y monedas de diez. Hay 9 pesetas más que monedas de diez. Halla el número de pesetas y monedas de
diez.

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.

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?