1. Write an equation for the ellipse with end points of the major axis at(7,1)and(-7,1)and end points of the minor axis at(0,5) and(0,-3)
2. Write an equation for the parabola with focus(4,0)and directrix y=2.
3. A coin is tossed 5 times.find p(atmost 4 tails)
a. 3/16
b. 13/16
c. 1/32
d. 31/32
4. For 2000 patients,blood-clotting time was normally distributed with a mean of 8 seconds and a standard deviation of 3 seconds.what percent was blood-clotting times between 5 and 11 seconds?
a. 68%
b. 34%
c. 49/5%
d. 47/5%
5.during a sale,1/6 of the CD prices are reduced.find the probability that 2 of 4 randomly-selected CDs have reduced prices?
a. 5/36
b. 25/1296
c. 25/216
d. 5/216