[size=150]Which is larger: the number of meters across the Milky Way, or the number of cells in all humans? Explain or show your reasoning.[/size][br]Some useful information:[list][*]The Milky Way is about 100,000 light years across.[/*][*]There are about 37 trillion cells in a human body.[/*][*]One light year is about [math]10^{16}[/math] meters.[/*][*]The world population is about 7 billion.[/*][/list]

Write an equation for the line.

What does the slope of the line tell you about the wingspans and lengths of these butterflies?

[size=150]Diego was solving an equation, but when he checked his answer, he saw his solution was incorrect. He knows he made a mistake, but he can’t find it. Where is Diego’s mistake and what is the solution to the equation?[/size][br][br][math]\displaystyle \begin{align} \text-4(7-2x)=3(x+4)\\ \text-28-8x=3x+12\\ \text-28=11x+12\\ \text-40=11x\\ \text{-}\frac {40}{11}=x\ \end{align}[br][/math]