the answer is in the photo
Answer:
Step-by-step explanation:
Given
Represent Jimmy with J and Bob with B


Required
Determine the expression for B

Substitute 21,356 for J

Convert Mixed fraction to improper
The above is an expression for B
Solving further, we have



The formula for the volume of a cone is:

The formula for the volume of a cylinder is:

The formula for the volume of a triangular prism is:

The formula for the volume of a pyramid is:

The formula for the volume of a rectangular prism is:

Answer:
2.0
Step-by-step explanation:
Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die
The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)
The first moment (AKA the average is..)

The second moment is..


Take the 2/5 and multiple it by 3 to get 6/15....then take the 1/3 and multiple it by 5 to get 5/15. Then add this together (6/15+5/15=....) to get 11/15