Select all of the expressions that are equivalent to 2.5¹⁶
2.5⁴ ⋅ 2.5⁴
1.25¹⁶ ⋅ 2¹⁶
2.5⁸ ⋅ 2.5⁸
(2.5⁸)⁸
(2.5⁸)²