In isosceles triangle $\triangle abc$ we have $ab=ac=4$. The altitude from $b$ meets $\overline{ac}$ at $h$. If $ah=3(hc)$ then determine $bc$.

Balanced rock sits on a thin spike of rock in a canyon what forces keep the rock balanced on its tiny pedestal

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity

Ten students compared the amount (in dollars) they spent on books each week. the box plot shows the results. the median amout they spent each week is . the difference of the first and third quartiles of the data set is?