Answer:
0.0048cm/s
Step-by-step explanation:
Volume of the spherical balloon is expressed as;

dV/dt = dV/dr * dr/dt
Given
dV/dt = 5cm³/s
dV/dr = 4πr²
Since V = 972picm³
972π = 4/3πr³
972 = 4/3r³
4r³ = 972 * 3
r³ = (972 *3)/4
r³ = 729
r = ∛729
r = 9cm
dV/dr = 4π(9)²
dV/dr = 324π
dV/dt = dV/dr * dr/dt
5 = 324πdr/dt
dr/dt = 5/324π
dr/dt = 5/324(3.14)
dr/dt = 5/1017.36
dr/dt = 0.0048cm/s
 
        
             
        
        
        
Step-by-step explanation:
1/2 (c +1)>5 = c≥9
27-2b<-6=b≥332
 
        
             
        
        
        
First of all 1+2=3 which leads to 6:3x=1 3x=6:1 3x=6 X=2
        
             
        
        
        
48-4=44,in the left 
6×7=42,in the right
44>42,so > is the answer
        
                    
             
        
        
        
Answer:
20y + 5x
Step-by-step explanation:
Combine like terms 
12y + 5x + 8y
20y + 5x