Which of the following is equivalent to i⁹ A. i²⁷/i³

B. (i⁴) (i⁵)

C. (i³)²

D. i

E. (i • i) x (i•i•i•i) x (i•i•i)

F. (i³)³

(there could be more than one answer)
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Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.