Two positive improper fractions multiplied. is the product sometimes, always, or never less than 1? explain

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Which expression is equivalent to 3^3 + 2^2?