Erika spends about 4 hours each week practicing her violin. How much time would Erika spend practicing her violin for an entire year?

There are 52 weeks in a year. So the problem is 4 x 52

Step-by-step explanation:

The area of a triangle is half of it's base times its height. The base of this triangle is 54 cm, and the height is 1.2 m.
 
It's important to notice that the base is 54 CENTIMENTERS, and we want our final answer in square meters, so let's convert it. 100 centimeters = 1 meter, so 54 centimeters = 0.54 meters.

Let's use that formula bh/2 (base*height/2) to find the area: