Need help please!
I know the first answer is 19 as it is going up by 3 each time. For the second answer I have tried 3n and n+3 and n= 3 but it isn’t accepting the answer any help appreciated!

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

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.

Ten times the square of a non-zero number is eqaul to ninety times the number