Only need to answer question 1 but if you can pls answer both

What’s the domain of this function? fastttt

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?