Answer: 6.25 x 10 to the 21 power
Explanation:
250 million= 250 x 10 to the 6 power
25 trillion = 25 x 10 to the 12 power
250 x 10 to the 6 power x 25 x 10 to the 12 power
250 x x 25 x 10 to the 6 power x 10 to the 12 power
6250 x 10 to the 6 power x 10 to the 12 power
6.25 x 10 to the 3 power x 10 to the 6 power x 10 to the 12 power
6.25 x 10 (3+6+12)
ANSWERR : 6.25 x 10 to the 21 power