Show that cos^2 330degrees=1

A farmer finds that if she plants 100 trees per acre, each tree will yield 35 bushels of fruit. She estimates that for each additional tree planted per acre, the yield of each tree will decrease by 3 bushels.

Terrance must decide which job offer to accept. one job pays $25 per hour for 37 1/2 hours each week and the other pays $825 per week regardless of how many hours he works. which job should terrance take? why?

Which numbers are a distance of 3 units from - 1-1 on a number line?

Sarah is 12 years old. Her sister, Emily, is 8 years less than 3 times Sarah's age. Write an expression for Emily's age in terms of Sarah's age, s.

The following data was collected on a cheetah. It ran ½ mile in 2/3 min, ¼ mile in 1/3 min, and ¾ mile in one minute. 1. Give one method that can be used to prove that the different rates for the cheetah's data are proportional or non-proportional.

Whats the range of 78,89,93,73,99,87,92,89

The product of three numbers is - 216 but their sum is - 18. What are these three numbers?

12. Find the slope of (-6, 19), (-8,-4)

Juanita begins to factor an expression as shown. x2 + 3x - 18 = (x + ) (x - ) The numbers that should be placed in the boxes, from left to right, are .

Rewrite the quadratic function in the form that best reveals the zeros of the function: f (x) = 2 (2x^2+4x) + 3 f (x) = ?