If all the angles are 60 degrees, this is an equilateral triangle. This means that all the sides have the same lengths. Whatever length side a is, b and c have the same length.
Hope this helps :)

Step-by-step explanation:
find the value of the constant of proportionality k

c =total cost
d =days
Where’s the picture? Then I could help you but I don’t see one
Answer:
22
Step-by-step explanation: