Answer
$V_{total}$ = $ 116V$
Work Step by Step
The voltage applied in the circuit can be calculated as the hypotenuse of the right triangle by using the Pythagorean Theorem.
Thus, we have:
$V_{total}^2=(85.2V)^{2} + (78.4V)^{2}$
$V_{total}$ = $\sqrt {(85.2V)^{2} + (78.4V)^{2}} = 115.78~V\approx 116~V$
