If there are 48 double decker buses in a depot and 24 single, what percentage of the buses are single decker?

What is the measure of angle tvu shown in the diagram below

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 ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels