What is the perimeter of this rectangle?

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?