After more than a decade of studying wildfires, San Diego County took its final exams last week. Did we pass? Authorities say the region is far better equipped to handle swift, wind-whipped flames than it was during the firestorms of 2007 and ’03. “We’re about $460 million more prepared,” Supervisor Dianne Jacob said Friday, “both on the ground and in the air.”Officials cited better communication between fire agencies; more fire engines and air tankers on the front lines, day and night; and better tracking of the flames.