You and your friend rent a canoe. the canoe costs 10 dollars per half hour plus 5 dollars per day for each life vest. life vests are required for each passenger. canoes can only be rented after 8 a. m and must be returned by 6 p. m. what is the greatest range value for this situation

The greatest rangethe range is ur y value, it will be the total cost...the x is gonna be the number of 1/2 hrs. And the 5 per life vest has to be multiplied by 2 because there is 2 people, making it 10
y = 10x + 10

the greatest range will be when u rent the canoe for the longest.
8 a.m to 6 p.mthats 10 hrs20 half hrs...so the greatest range is when u rent the canoe for 20 half hrs.

y = 10(20) + 10
y = 200 + 10
y = 210 <=== the greatest range