This is a longer, exam-style problem that requires the densities of two very different types of plastics to be found. It involves interpreting a description to form two simultaneous equations. The equations are based on the formula for density i.e. mass divided by volume. When combined these form a quadratic equation that must be rearranged to the form ax^2 + bx + c = 0 to solve it. The equation will not factorise, so completing the square method or the Quadratic Formula must be used. When both densities are found, there is a further requirement to express the ratio of the higher density plastic to the lower density plastic.
DOCX and PDF worksheets supplied along with 2-page solution in JPEG format.
DOCX and PDF worksheets supplied along with 2-page solution in JPEG format.
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useful..... real life application
thanks
this is a rare find - thank you!
Thanks for uploading this challenging problem which encompasses a few key techniques (which is ultimately what students will have to do to solve real life problems beyond school education). The model solutions are helpful too!
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