PLEASE HELP The graph above shows the cost of hay. Jethro bought three bales of hay. Which is the total cost that he paid for the hay?
A. $10.50
B. $12.00
C. $13.50
D. $7.50

How do you answer this question? (step by step)

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¯¯¯¯¯¯¯¯)?

Factor the polynomial expression x6 – x3 – 20