DUDE THESE WERE SO EASY I DID THIS IN 4TH GRADE YOYR TOO YOUNG OK OK
Answer: do L x W x H = a
Begin by using the cosine rule to find the unknown side.
Where a- unknown side, b is 12, c is 16 and angle in between is 108°
The cosine rule...
a² = b² + c² - 2bc cosA
= 12² + 16² - (2×12×16 cos108°)
= 518.655076
Taking the positive
square root...
a = 22.774
a = 22.8 cm nearest tenth
Answer: Group 12
Step-by-step explanation: The element is Mercury.
Hey there! :D
70/280= 0.25
0.25*20= 5
5+20=25
h=25
I hope this helps!
~kaikers
