What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

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! )

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale