Answer:
D
Step-by-step explanation:
2ab*cos(C)=a^2+b^2-c^2
2ab*cos(C)=5^2+4^2-2^2=25+12=37
The 2nd one
In this table we can see that all y values are the x value multiplied by 5, so it is proportional.
7 is greater than -1
x = 1.998 + 3.123
Therefore, The value of x is 5.121
12.5ft
