Melissa is saving money to buy a game. So far she has saved $20, which is four-fifths of the total cost of the game. How much does the game cost?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

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.