Department of Astronomy, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. Department of Astronomy, National Research Institute of Astronomy and Geophysics, Cairo, Egypt. Department ...

Given any cubic or quartic equation with real coefficients, it can be transformed by a change of variable into a standard form, and thus solved by means of a double-sided scale (Fig. 1) in the case of ...

The Mathematics Teacher (MT), an official journal of the National Council of Teachers of Mathematics, is devoted to improving mathematics instruction from grade 8-14 and supporting teacher education ...

This is a preview. Log in through your library . Journal Information Tables of contents for recent issues of Oxford Economic Papers are available at http://oep ...

Often it is necessary to look at several functions of the same independent variable. Consider the prior example where x, the number of items produced and sold, was the independent variable in three ...