It takes Victoria 2 hours to pick up 8 kg of strawberries. When she is helped by her son, Ethan, it takes them 1 hour and a quarter. How long would it take Ethan to pick up 8 kg of strawberries alone? Give your answer in hours and minutes.
Anthony is mixing 75 cL of a beverage that contains of sugar to a sugar syrup. How much of this sugar syrup should be added if he wants his beverage to contain of sugar?
A speech therapist charges two different fees, $20 and $35, depending on the type of the session. On a given day, she has already had 3 sessions at $20 and 4 at $35. For the rest of the day, she will only have sessions at $20. How many of those should she give to earn an average rate of $25 per session?