Final answer:
The answers for the questions are a) The ratio of the number of machines to the number of crates packed per day is 40:140. b) 70 machines would pack 245 crates of apples per day.
Step-by-step explanation:
a) The ratio of the number of machines to the number of crates packed per day can be written as 40:140.
b) To find out how many crates of apples 70 machines would pack per day, we can set up a proportion:
40 machines : 140 crates = 70 machines : x crates
Cross-multiplying, we get:
40 * x = 70 * 140
Simplifying the equation:
x = (70 * 140) / 40
Calculating the value of x, we find:
x = 245
Therefore, 70 machines would pack 245 crates of apples per day.