What is the volume of the prism? ft³​

Do you mind if you guys me with this question i’m on number 8

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .

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