Which of the following could be the equation for a parabola that opens down with vertex (-11, -28)?
A. x=-5(y + 28)2 - 11
B. y= -5(x +11)2 - 28
C. X= 5(y +11)2 - 28
D. y = 5(x+28)2 - 11

Volume of cylinder with a radius of 8cm and height of 25 cm

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?