Two artillery bases are located at the points \( P \) and \( R \) represented in the figure. Each of the bases locates an enemy airplane at point \( Q \) and measures the angles of elevation to the airplane. Given the elevation angles in the figure and the fact that the two bases are 662 meters apart, what is the distance, in meters, from the base at point \( R \) to the airplane? (Round your answer to the nearest tenth if necessary.)

4. Which theme does this passage want to express to the reader a. good overcomes evill b. honesty is the best policy c. the importance of family d. doos are fiendlier thon cots

\( \lim _ { x \rightarrow 0 ^ { + } } \frac { \sqrt[ 3 ] { x \sin ^ { 2 } ( 2 x ) } ( \sqrt { x } - 1 ) } { e ^ { x } - \cos ( 3 x ) } \)

\( f ( x ) \)

7. Graham recibe \( \$ 690.000 \) al jubilarse. inuen en una renta vitalicia a ucinte años, inmediata con pagos anuales y el resto \& 690.000 - x se utiliza para comprar una perpetuidad inmediata con pagos anuales. Durante los primeros veinte años, los pagos anuales totales que recibe de las dos inucrsiones son el dobl. delo que recibe posteriormente. la tasa de interes eqectiva anual es del \( 5 \% \) halla \( x \).

c) \( \sin ^{2} x \cdot\left(1+\cot ^{2} x\right) \)