Answer:
Step-by-step explanation:
10 boys..............................15 girls
20 boys...............................30 girls
we just multiply by 2
It is less than 20 km, because 20 km is equal to 20000 m
Answer:
A
Step-by-step explanation:
Answer: The exponent
Step-by-step explanation:

a is the coefficient,
b is the base
x is the exponent