A point B at (1,2,3) in 3D cartestian system. what is it's new coordinate after rotating 60 degree anti clockwise along the z axis. are the new coordinate same if rotation is clockwise. use 3d matrix rotation and matrix product

Which choice represents the sample space ,s for this event

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.

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !