How to find the hypotenuse without the short leg?

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

The trigonometric ratios sine and secant are reciprocals of each other

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?