Find the First Derivative of W(t) = 7 $t ^ { 2 }$

Multiple Choice

Find the first derivative of w(t) = 7 $t ^ { 2 }$ - 19 $\sqrt { t }$ + 23

A) 14t - $\frac { 19 } { 2 }$ $\sqrt { t }$
B) 14t - $\frac { 19 } { 2 \sqrt { t } }$
C) $\frac { 7 } { 2 }$ t - $\frac { 19 } { 2 \sqrt { t } }$
D) $\frac { 7 } { 2 }$ t - $\frac { 19 } { 2 }$ $\sqrt { t }$