So you need to use the inverse tan to find the measure of angle c.
So since tan is opposite over adjacent.
You get the inverse tan of 6/8. And you get 36.87 degrees.
8,624 rounded to the nearest thousand is 9,000
Hope this helps
-AaronWiseIsBae
B) 20 Multiplied by 15 multiplied by 9 is equal to 2,700cm cubed