Without graphing the equation y= -2(x-3) ^2 +5, describe the key features of the graph that are obvious from the equation. with steps i have to explain how i got that. it is a dba !

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Nikolas calculated the volume of the prism. his work is shown below.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.