Pls help im desperate.

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)