Which expression is
equivalent to
(7+85-2r²) +-47²-10+2r)

Write the sentence as an equation. z plus 372 is equal to 160

What is the standard form of -5x^2+2x^4-11+x^3+3x

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.