Melody

unbalanced brackets

take the log of both sides.

look up logs in the formulary page to work out what to don next.

draw the rectangle

put the side lengths on

add them up

Maybe this will help

I had no idea so I consulted Wolfram|Alpha

I think that you mean  e^(-0.09)  and you can use the calc on the home page.

$$\\\ddot y =9.8\;\;m/s^2\\
\dot y = 9.8t\;\; m/s\\
y=\frac{9.8t^2}{2}=4.9t^2\;\;m\\
\mbox{When y=49 find t}\\
49=4.9t^2\\
10=t^2\\
t=\sqrt{10}=3.16\;\;sec\;\; \quad (to \;2\;dec\;places)$$

$$\\\frac{5x+1}{x^2 + x -2}- \frac{3}{x+2} \\\\
\frac{5x+1}{(x+2)(x-1)}- \frac{3}{x+2} \\\\
\frac{5x+1}{(x+2)(x-1)}- \frac{3(x-1)}{(x+2)(x-1)} \\\\
\frac{5x+1}{(x+2)(x-1)}- \frac{3x-3}{(x+2)(x-1)} \\\\
\frac{5x+1}{(x+2)(x-1)}+ \frac{-3x+3}{(x+2)(x-1)} \\\\
\frac{5x+1-3x+3}{(x+2)(x-1)}\\\\
\frac{2x+4}{(x+2)(x-1)}\\\\
\frac{2(x+2)}{(x+2)(x-1)}\\\\
\frac{2}{x-1}\\\\$$

FV=P(1+r)^n

6050=P(1+0.1)^2

solve for P

12.52*5.88*10^12