Answer:
12
Step-by-step explanation:
To find the mean, we add up all the numbers and divide by the number of numbers
(19+ 12+9+ 6+ 12+ 8+ 18+ 12+ 14+ 10)/10
120/10
12
Answer:
160 cm²
Step-by-step explanation:
V = 1/3 * 24 * 20 = 160 cm²
Answer:

Step-by-step explanation:

Simplified becomes;

Simplifying further gives; 
Answer:
there are four significant figures
Step-by-step explanation:
zeros to the right of a non zero digit are ambiguous