Using numbers and operations to write each phrase as an expression the difference between 58 and 47

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex