6. a. Solve for x: $\log_2 (x-3) + \log_2 x = \log_2 10$
b. Expand: $\log \frac{y^2(x-6)^5}{W^9}$
7. Graph, show table ($-1 \le x \le 6$), state y-intercept, asymptote, domain and range. $f(x) = 3 - 2^{-x^2}$
8. a. A ball is thrown directly upward with velocity of 40 ft/s, its height(in feet) after t seconds is given by $y = 40t - 8t^2$. Find the maximum height and the time it takes to reach it. You must use $x = -\frac{b}{2a}$
b. Graph the function. Show the table.