The ratio of blueberries to strawberries is 1: 7if there are 210 strawberries how many berries are there

These question are hard can you me with answers

Use the x-intercept method to find all real solutions of the equation. x^3-10x^2+27x-18=0

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.