Predict what will happen to the coordinates of a point (x, y) as the point rotates counterclockwise (CCW) about the origin to produce point (x′, y′). Choose rotation angles of 90°, 180°, 270°, and 360°. Express your answers in terms of x and y. Be sure to watch your signs.

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.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?