Anna is going to play guitar in her school's annual concert. if she starts by practicing for one hour per day and increases the time by 30 minutes each day, how long will she practice on the seventh day?

To do this just add. So 1 hour on the first day. 1 hour 30 minutes on the second day. 2 hours on the third day. 2 hours 30 minutes on the fourth day. 3 hours on the fifth day. 3 hours 30 minutes on the 6th day, and 4 hours on the 7th day. If they ask for it in minutes it would be 240 minutes.

9/12 is the answer because 3/4 times 3 each is 9/12

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's