If cosx is approximately 0.9511, what is the measurement of x to the nearest degree? approximately, what is the sin of the angle that is complementary to x?

Consider the function f(x)=−2/3x+5 . what is f(1/2) ? enter your answer, as a simplified fraction, in the box. f(1/2)=

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?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?