If 30% of his collection is 12 cars, then we can use the fraction
30/12=100/x
x=40
Answer: 
<u>Step-by-step explanation:</u>

Answer:
Square root of 29.
Step-by-step explanation:
Distance = sqrt(2^2 + (-5)^2)
= sqrt 29.
Answer:
This question is statistical.
Step-by-step explanation:
This question is statistical because some elephants may have same area of ears and we can represent the data in a graph.