What's the index notation of 4x4x4x5x5 and 9x7x9x9x7x9 Someone answer pls!!! Urgent

Which of the following is the result of expanding the series

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.