SOLUTION: Kris spikes his hair using gel. If he uses 4 mL of gel every day for 20 days and 3 mL every day after that, how many days total will it take him to empty a 128 mL tube of gel?

Question 237224: Kris spikes his hair using gel. If he uses 4 mL of gel every day for 20 days and 3 mL every day after that, how many days total will it take him to empty a 128 mL tube of gel?

Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
In 20 days, he will use 4 * 20 = 80mL of gel.
128 - 80 = 48 mL of gel is left.

48 / 3 = 16

In 16 days he will use up 48 mL of gel.

The total number of days to exhaust the supply of gel would be 20 + 16 = 36

gel runs out after 36 days.

20*4 + 16*3 = 80 + 48 = 128

RELATED QUESTIONS
A man received $12 and free board for every day that he works but for each day that he is (answered by yenfox)

Aji has an argument with his daughter. She says, "you do the same thing every day." Aji... (answered by richwmiller)

a laborer was employed to work for a daily wage of $15 and paid $2 per day of board. He... (answered by oberobic)

Winston buys eggs from a village 120 kilometres from the town where he sells them. He... (answered by richwmiller)

andre must water his cactus plant every 9 days he must also feed it every 56 days he... (answered by stanbon,ikleyn)

Mr. Roland, an elementary school teacher, has 24 students. Every day he picks two... (answered by stanbon,schrammbledeggs)

You plan to save 1 cent the first day of the month, 2 cents the second day, 4 cents the... (answered by venugopalramana)

Trevor jogs once every 3 days and swims once every 4 days. How often does he jog and swim (answered by stanbon)

A pharmacist receives a prescription for 60 g of a 0.75% w/w bexarotene gel. How many... (answered by ankor@dixie-net.com)