A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of a specific drug involved only 5 subjects. Assume that we want to treat 5 healthy humans with this new drug and we have 10 suitable volunteers available. Complete parts (a) through (c) below. a. If the subjects are selected and treated in sequence, so that the trial is discontinued if anyone displays adverse effects, how many different sequential arrangements are possible if 5 people are selected from the 10 that are available? Choose the correct answer below. A. 30,240 B. \( 3,628,800 \) C. 120 D. 252

The individuals who are in the control condition (the control group) al control group allows researchers to compare individuals who receive is effective. Here, the control group consists of people who received \( t \) operationally defined it as

The result displayed was \( 6.93 \mathrm{E}-44 \) for one computation.

\( \left. \begin{array} { l } { f ( x ) = \left\{ \begin{array} { l l } { 2 x + 7 , } & { - 4 \leq x < - 1 } \\ { 3 x + 5 , } & { - 1 \leq x \leq 2 } \end{array} \right.} \\ { g ( x ) = \left\{ \begin{array} { l l } { 3 x + 5 , } & { - 2 \leq x < 0 } \\ { x ^ { 2 } + x } & { 0 \leq x \leq 1 } \end{array} \right.} \\ { ( f + g ) ( x ) = } \end{array} \right. \)

Si a cuatro veces el cuadrado de un numero so io suma 35 , se obtione lo misma duia a 50 se le resta la suma del doble de ese numero y 15 . Formula ta ecuacion que representa el enunciado y encuentra los numeros que satisfacen lo descrito.

d. \( \left\{\begin{array}{l}3 x-y=-7 \\ 5 y+6 x=14\end{array}\right. \)