Answer: Calculate the volume of each individual figure and add them.
Step-by-step explanation:
1. A composite figure is formed by two or more figures.
2. Then, to calculate the volume of the composite figure you must calculate the volume of each individual figure and then you must add all the volumes obtained.
3. For example, if a composite figure has a cylinder and a cone, the volume of the composite figure will be the sum of the volume of cylinder and the volume of the cone:

Answer:
Kara's age = 15 years
Step-by-step explanation:
Let Kara's age = n years
Cassie's age = 2n - 3
Sum of their ages = 42
n + 2n - 3 = 42 {Combine like terms}
3n - 3 = 42 { add 3 to both sides}
3n = 42 +3
3n = 45 {Divide both sides by 3}
3n/3 = 45/3
n = 15
Kara's age = 15 years
23456 if the lr round the answer to the tenth