Answer: Package B is least expensive; Will save $5
Step-by-step explanation:
Package A
$200 for 5 lesson=$40/lesson
Package B
$350 for 10 lesson=$35/lesson
35<40
Package B is least expensive
-------------------------------------------------------
40 (Package A)- 35 (Package B)
=$5
1/6 may be but in decimal i got 0.6
w = 50 - 2.5t
Is there a viable solution when time is 30 minutes? No, because by then the tub will be empty.
Hope this Helps!!