Answer:
$19.20
Step-by-step explanation:
if every hour they pay$4.80 and they go ice skating for 4 hours all you have to do is multiply $4.80 x 4
 
        
             
        
        
        
-70, -100, +20
Step by step explanation: Follow the pattern.
        
             
        
        
        
<h3>
Answer:  
</h3>
Explanation:
The identity we'll use is cos(-x) = cos(x) for any value of x. 
So cos(-150) = cos(150). 
Then locate the angle 150 on the unit circle. The terminal point is 
The x coordinate of this terminal point is the value of cos(150).