Using half-angle formulas, find the exact value of cos x/2 given the following constraints.

cos (x) = - 12/13, pi< x< 3pi/2

Question 3 assume that serum potassium levels in a healthy population are normally distributed, with a mean of 4.5meq/l and a standard deviation of 0.6meq/l. a. (2pts) what proportion of the population has serum potassium levels between 4.2 and 4.

How do you solve h=-16t^2+40

How do I simplify 6y-y

Which of the following best describes using a slope of - 2/3 on a graph? Move down 2 and left 3 Move down 2 and right 3 Move left 2 and up 3 Move up 2 and right 3

This year my age is a multiple of 4, Next year my age is a multiple of 5. I'm older than 18 and younger than 42. How old am I?

Last school year the enrollment of Genoa Middle School was 465 students. This year the enrollment is 525. What is the percent of change rounded to the nearest whole?

Which of the following is a counterexample to the following statement? Subtraction of whole numbers is commutative. n + s ≠ n - s 4 - 3 ≠ 3 - 4 10 - 0 ≠ 10 2 - (4 - 3) ≠ (2 - 4) - 3

The length of a rectangle is six times it's width if the area of the rectangle is 600m2 find its perimeter

Which type of structure is used to determine which of two sets of instructions to execute?

If the mean of the data set shown below is 11, find x. x, 12, 8, 15