Solve for the roots of x in each of the equations below.

a. x4 - 81 = 0
b. x4 + 10x2 + 25 = 0
c. x4 - x2 - 6 = 0

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.