25
evaluate log7 343.

a. 49
b. 3
c. −3
d. −49

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

a. she will receive a refund of $278.

step-by-step explanation: