Given a prism ABC. A'B'C' whose base is an equilateral triangle of side a. Let H be the midpoint of AB and A'H perpendicular (ABC). a. Calculate V. ABC. A'B'C '.
b. Let D be the midpoint of side A. A'. Calculate V. DABC

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

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

I'm confused on this could anyone me and show me what i need to do to solve it.