What math problem can be made that equals 13 using all order of operations? (parentheses exponents division addition subtraction multiplication)

Ahealth-food producer has 250 samples of a new snack to distribute in the mall. the producer has to keep at least 50 samples for display in the health food for the product launch. how long will the samples last if consumers are taking the samples at a rate of 25 every hour

Given: tangent if m 1 = 30° and m = 20°, then m = 10 40 80

Find an equation of variation where y varies directly as x and y 75 when x5, findy when x is 1