Answer:
a) 249 = 249 or 2.49 × 10²
b) - 100 = - (10)²
c) 10 + 7169 = 7179
Step-by-step explanation:
The answer is B because x = 4 so 12x4-3=45
sin()=Sin(-0) =Sin 0=0
Option C Sin()=0
Also, using unit circle, Sin()=0