Completa la fracción equivalente para mostrar el número de estudiantes de secundaria por cada 4 voluntarios. \( \frac{10}{40}=\frac{\square}{4} \)

Find the number that makes the ratio equivalent to \( 18: 22 \). 72 :

\( 106 \quad ( \frac { 1 } { 199 } + \frac { 1 } { 200 } ) : ( \frac { 1 } { 199 } - \frac { 1 } { 200 } ) \)

What is the number of possible permutations of 8 objects taken 4 at a time? A. 24 B. 70 C. 1,680 D. 40,320

What is the domain of this radical function? \( f(x)=\sqrt{x+1}-3 \) A. \( [3, \infty) \) B. \( [-3, \infty) \) c. \( [1, \infty) \) D. \( (-1, \infty) \)

Find the number that makes the ratio equivalent to \( 99: 18 \), \( 11: \)