PLEASEE HELP I need an expression that includes 3 operations and equals a negative number. Show all work

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

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.

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?