Its decagon. cause it has 10 corners.
Answer:
2800
Step-by-step explanation:
Just round the 43 to 40 and the 68 to 70. So the problem then converts to 40x70 to get a rough estimate. 40x70=2800
The answer is C
First multiple 4 into bracket then put +1 in both side so it will be y = 4x-11
2 3/8 pounds = 19/8 pounds, each burger requires 1/4 or 2/8 pounds
2/8 pounds/burger times ten burgers would require 20/8 pounds of meat, dao only has 19/8 pounds.
If this is supposed to be

Then this can simply be reduced to

by the double angle formula for cosine