d !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
        
             
        
        
        
Answer:
6173/500
Step-by-step explanation:
12.346 as a fraction:
Move the decimal over a power of 10:
12.346 → 6173/500
6173/500
Hope you learned from this answer!
 
        
                    
             
        
        
        
Answer:
48
Step-by-step explanation:
 
        
             
        
        
        
1. h₀ = 70  
v₀ = 0 since the rock is dropped it has no initial velocity  
when the rock hits the ground the height = 0  
plug into the formula  
0 = -4.9t² + 0(t) + 70  
0 = -4.9t² + 70  
Add 4.9t² to both sides  
4.9t² = 70  
Divide both sides by 4.9  
t² = 14.2857142857  
Take the square root of both sides  
t = 3.7796447301  
t ≈ 3.8 seconds 
I am not doing the rest I only did one just to help you understand a bit more