Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the
solution.
- $\left( \frac { 1 } { 2 } \right) ^ { x } = 15$

A) {-0.26}
B) {-7.50}
C) {3.91}
D) {-3.91}