2. 2l has to be less than or equal to 108-40
This is because the garden is a rectangle, meaning that the 2 widths and 2 heights will be the exact same.
So, if the width is 20 and there are 2 “width” sides of a rectangle, the total perimeter - 40 will give you length of the 2 other sides, combined. This is why 2x the length has to be less or equal to 108-40.
4. 0.25
Mika does 3 things everyday for 5 days, which takes 7.5 hours.
So, 7.5 / 5 = time spent doing 3 things everyday
Mika spends 1.5 hours everyday cleaning, tuning, and playing.
BUT,
The question is asking how long she spends JUST cleaning and tuning.
It also tells you that he practices for 1.25 hours everyday.
So, if he takes 1.5 hours to do all 3 things and practices for 1.25,
1.5 - 1.25 = 0.25
She does spends 0.25 hours everyday cleaning and tuning.
