Let m = the total number of medals.
To find the total number of medals we can use either of the clues they gave us.
If Tara's team received 8 medals and that was 1/3 of the medals.  That must mean that:
m x 1/3 = 8
What number divided by 3 is 8? Well, that is 24.  Thus, the total number of medals is 24.
Note: we can check to see if 1/2 of 24 is 12, the total number of medals Jennifer team received, and it checks out!
        
             
        
        
        
Answer:
15:21 = 5:7
Step-by-step explanation:
21/7 = 3
5 x 3 = 15
 
        
             
        
        
        
Answer:
here's the answer I have in the photo and solution too
 
        
             
        
        
        
Given that, a sphere has a surface area of about 999 square millimeters. 
Formula to find the surface area of sphere is, 
S= 4πr² Where r = radius of the sphere and S= surface area. 
Given S= 999 square millimeters.
So, we can write:
4πr² = 999
4 * 3.14 * r² = 999 Since, π = 3.14
12.56 *r² = 999 
 Divide each sides by 12.56.
 Divide each sides by 12.56.
 r² = 79.53821656
r = √79.53821656 Taking square root to each sides of equation.
r = 8.918420071
So, r = 8.918 Rounded to nearest thousandth.
So, radius of the sphere is 8.918 millimeters.
Hope this helps you!
 
        
             
        
        
        
Answer:
anything x 0 is 0
Step-by-step explanation: