Answer:  Period = 4
                Amplitude = 3 
<u>Step-by-step explanation:</u>
Period is the interval of one "cycle" before the pattern repeats.
If you notice that when x = 0, y = -4.  
When does the pattern repeat (reach -4 again)? 
Answer: when x = 4. 
So the interval of one "cycle" is 4 units -->  Period = 4.

 
        
                    
             
        
        
        
Answer: C.) 1.12 seconds
Step-by-step explanation:
Hi, to answer this question we have to substitute h=0 (when the rock hits the ground the height above it is 0) in the equation given:
h (t) = –16t2 + 20
Solving for t (time)
0= –16t2 + 20
16t2=20
t2=20/16
t=√1.25 =1.12 seconds (option C)
Feel free to ask for more if needed or if you did not understand something.
 
        
             
        
        
        
Answer:
they purchased 40 tickets 
Step-by-step explanation:
they already spent 10 to get in the fair and 0.25 × 40 = 10 so 10 +10 =20
 
        
             
        
        
        
Hey there. The answer is: w/4 + 7 = 3.
I hope you find my answer the most helpful! :)
        
             
        
        
        
Answer:
im confused 
Step-by-step explanation: