The trinomial x2 + bx + c factors to (x + m)(x + n). If b is negative and c is positive, what must be true about m and n? m and n are both positive.
m is positive and n is negative.
m is negative and n is positive.
m and n are both negative.

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Question and answers are in the attached picture. you so much in advance.

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.