In a science experiment the temperature of a substance is changed from 42 °f to -54 °f at an average rate of -12 degrees per hour. over how many hours does the change take place? the answer is 8 hours i need the work for it though.

What is the solution to the inequality

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

If point cis between points a and b, then ac + — = ab