Write two equivalent ratios. 8. 2/7 / 9. 6/5 10. 9/12 11. 18/6. for the .

8. 2/7

 2     2         4
---*  = 
 7     2        14

 2       3          6
--- *  =  
 7       3         21

9. 6 /5

 6     4         24
--- * =  
 5      4         20

 6      10          60
--- * =  
5       10          50

10. 9 / 12

 9         9/3         3
=  =  
12       12/3        4

9       5          45
--- * =  
12     5         60

11. 18 /16

18      18/2          9
--- =    =  
16       16/2         8

18       3          54
*  =   
16       3          48

He has to pay $ 2.76 for the yogurt.

Step-by-step explanation:

Given data

Cost of each ounce = $ 0.24

Vanilla yogurt = 6.5 ounces

Strawberry yogurt = 5 ounces

Total ounces = 6.5 + 5 = 11.5 ounces

Now Total cost of yogurt = 11.5 × 0.24

Now Total cost of yogurt = $ 2.76

Therefore he has to pay $ 2.76 for the  yogurt.