Aster inc. is a trading firm. it has $5,500 worth of inventory at the beginning of the year. it made purchases worth $10,700 during the year. at the end of the year, the stock was valued at $3,700. what is the value of aster inc.’s cost of goods sold for the year?
a. $16,200
b. $19,900
c. $12,500
d. $8,900

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?