The circled one please
Mark brainliest!!

Answer:
50µs
Explanation:
The conversion is that 1 second equals 1,000,000 micro seconds. Since we have 0.00005 seconds, we will multiply that to a million.
0.00005 * 1,000,000 = 50µs
Keep in mind that 50 only has 1 significant figure because any trailing zeroes before the decimal point do NOT count.
Best of Luck!