Answer:
- Josh's book lands first
- Ben's lands about 0.648 seconds later
Step-by-step explanation:
Using the given equation for v=60 and s=40, the height of Ben's book is ...
   h(t) = -16t² +60t +40
We want to find t when h(t) = 0, so we're looking for the solution to ....
   0 = -16t² +60t +40
Using the quadratic formula, we find the positive value of t to be ...
   t = (-60 -√(60² -4(-16)(40)))/(2(-16)) = (15 +√385)/8 ≈ 4.3277
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Similarly, the height of Josh's book is ...
   0 = -16t² +48t +40
   t = (-48 -√(48² -4(-16)(40)))/(2(-16)) = (12 +√304)/8 ≈ 3.6794
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The time before Josh's book lands is shorter by ...
   4.3277 -3.6794 ≈ 0.6482 . . . . . seconds
Josh's book reaches the ground first, by about 0.648 seconds.
 
        
             
        
        
        
Answer:
   (c)  5/2
Step-by-step explanation:
The applicable rules of exponents are ...
   (a^b)(a^c) = a^(b+c)
   (a^b)/(a^c) = a^(b-c)
   a^-b = 1/a^b
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Using these rules, we can simplify the expression as follows:
   (5^-3)(2^2)(5^6)/((2^3)(5^2)) = (5^(-3+6-2))(2^(2-3)) = (5^1)(2^-1)
   = 5/2
 
        
             
        
        
        
Answer:
Step-by-step explanation:
                                                                                                                         thomas age is 47
 
        
                    
             
        
        
        
4x+2y i hope that helps :3