Find the focus and directirix of the following parabola. then, sketch the graph a) y=x²/2
b) 6x+y²=0

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample