Answer:
The ratio of juice boxes remaining to juice boxes drunk = 20 / 60 = 1/3
Step-by-step explanation:
300 ml is used for 6 pancakes.
1/4=0.25 miles
5/0.25=20 laps
José has to run 20 laps to run 5 miles.
Answer:
is one to one mapping, it is not onto mapping
Step-by-step explanation:

f₁(x) is one to one mapping
Let 
f₁(x) = f₁(y):
x₁³ = y₁³
f₁(x) is not onto mapping
Example: If f₁(x) = 7,
x₁³ = 7
![x_{1} = \sqrt[3]{7}](https://tex.z-dn.net/?f=x_%7B1%7D%20%3D%20%5Csqrt%5B3%5D%7B7%7D)
x₁ is not an element of Z
is one to one mapping, it is not onto mapping
Answer:
true
Step-by-step explanation: