The numerator and the denominator of a fraction are thirteen and fifty, respectively. when a certain number is added to this numerator and subtracted from this denominator, the resulting fraction has a numerator to denominator ratio of two to one. what is the number?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?

At the height of about 212 meters one shell square is the tallest building in new orleans marlin is creating a scale model of this building using the scale 250 meters = 1 meter to the nearest tenth of a meter what will be the height of the scale model