6*7=42
It’s the answer I guess.
Answer:
Step-by-step explanation:
speed=75 miles per hour

distance covered in 10 seconds=110×10=1100 ft
For this case we have to:
There are 6 plants per tray.
There are 6 trays for each flat, so for each flat there are
plants.
Saturday day:
Thus, on Saturday they sold 648 plants.
Sunday: 
Thus, on Saturday they sold 756 plants.
Thus, in total
plants were sold.
Answer:
plants were sold.