What value must k take in order for the following expression to be greater than zero? 3/k - 5/7

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?