Answer:
445.2 square cm
Step-by-step explanation:
The surface area consists of area of two bases and area of three leteral faces. Each lateral face is a rectangle with length of 23 cm and width of 6 cm.
The area of rectangle is

So,

The area of base is given as 
Thus, the surface area is

6 remainder 4 because if you do 8x6 you get 48 and if you subtract 48 from 52 you get remainder 4
Answer:
10-3x
Step-by-step explanation:
Answer:
5 years
Step-by-step explanation:
1. if able's age is x, then his sister's is x-4, and his brother's is 2x
2. if these sum to 32, then we can formulate the equation x+(x-4)+2x=32
3. now solve for x, 4x-4=32, 4x=36, x=9
4. if able's sister is x-4 years old, she is 9-4, or 5 years old