A scientist finds that an intial bacteria count of 16 million grows to 60 million after 6 days. Write an exponential equation of the form \( y=a b^{x} \) that models this scenario. Round \( b \) to four decimal places. \( \quad y=\square \)

En los ejercicios 27 a 42 , dibujar la curva representada por la función vectorial y dar la orientación de la curva \( 30 r(t)=\left(t^{2}+t\right) i+\left(t^{2}-t\right) j \)

Starting Point 1. \( (1,4) \) 2. \( (4,2) \) 3. \( (2,0) \) 4. \( (-1,2) \)

\( - 3 | \left. \begin{array} { r r r r } { 1 } & { 1 } & { - 21 } & { - 45 } \\ { 0 } & { - 3 } & { + 6 } & { 45 } \\ \hline 1 & { - 2 } & { 15 } & { \square } \end{array} \right. \)

In o cincle with radius 2 cm , a sector has an areo \( \mathrm{ncm}^{2} \). What is the measure of the are of the sector?

8 A hiker travels for 9.8 km on a true bearing of \( \mathrm{Ur}^{-1} \). I ne ustallue me winct is north of the starting point is: