The sum, S, of the first n even integers can be found using the equation S=n(n+1). If the sum of the first n even integers is 240, then what is n?​

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.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)