1.(09.01 LC) A graph of a quadratic function is shown below.

What is the vertex of the parabola shown? (5 points)
(30,0)
(800, 10)
(0, 600)
(10, 800)

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

What is the absolute value of the complex number -4-sqrt2i

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin