6.8/5 = 1.36
1.36 x 8 = 10.88
This means that the cost of an adult is $10.88
Enable M = Mary's age now So Mike's age is 3M 3M + 4 = 2 (M + 4) = 2M + 8 Now, subtract 2M from the two factors. then you definitely have: M + 4 = 8 or M = 4 examine: Mike is now 12. In 4 years, Mary would be 8 and Mike would be sixteen.
The significant figures of 6.07 are 3 significant figures.
I think it’s B. 7.50+1.50x<_15