64%, because 40% of 60% is 24%, and 2 mg of pure copper is 40% of the overall alloy, so add 24 and 40
Hey there!
As according to the mathematical acronym SOH CAH TOA (Sin Opposite Hypotenuse, Cos Adjacent Hypotenuse, Tan Opposite Adjacent), the correct answer would be the first choice,

.
The reason behind this is because the tangent value of an angle is always the length value opposite of given angle over the value adjacent (or right next to) the given angle.
In this case, the question is asking for Tan D. The side value opposite of angle D would be 12, and the length value that is adjacent to angle D is 5.
Therefore, the value of tan D would be

.
Hope this helps and I hope you have a marvelous day! :)
Answer:
area=17cm^2
Step-by-step explanation:
Solve the individual boxes first.
2*1=2
3*5=15
2+15=17
17cm^2
I know 8.4% is the 100 off of 1200 so i suppose .84?