Tim and sara invest $12,000 in equipment to print yearbooks for schools. each yearbook costs $5 to print and sells for $15. how many yearbooks must they sell before their business breaks even?

Answer this question, only if you know the answer. 30 points and brainliest!

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.

Find the values of y: 3y^3(y^2+ 2/3y)=0