cho hình chóp tứ giác đều SABCD có đáy ABCD là hình vuông cạnh a , cạnh bên SA=2a . Tính khoảng cách giữa hai đường thẳng AB và SC

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.