22/3 or 7.3333333333333333333333333333 or 7 1/3 feet
Answer:
Grace should use her phone for 58 minutes to maintain an average of 55 minutes.
Step-by-step explanation:
Usage of first month = 43 minutes
Second month = 62 minutes
Third Minutes = 57 minutes
Let, the usage of fourth month = k minutes
Mean of the data = 5 minutes
Now, Average of a Data = 
⇒
or, 55 x 4 = 162 + k
⇒ 220 - 162 = k
or, k = 58 minutes
So, Grace should use her phone for 58 minutes to maintain an average of 55 minutes.
Round to 3.14. Hope this helps
Euclidean space, the sum of measures of these three angles of any triangle is invariably equal to the straight angle, also expressed as 180 degress