The systolic blood pressure of adults in the usa is nearly normally distributed with a mean of 122 and standard deviation of 20 . someone qualifies as having stage 2 high blood pressure if their systolic blood pressure is 160 or higher. a. around what percentage of adults in the usa have stage 2 high blood pressure? give your answer rounded to two decimal places. b. if you sampled 2000 people, how many would you expect to have bp> 160? give your answer to the nearest person. explain how to find this in the calculator step by step. note: i had a bit of an issue encoding rounded answers, so try rounding both up and down if there's an issue! c. stage 1 high bp is specified as systolic bp between 140 and 160. what percentage of adults in the us qualify for stage 1? d. your doctor tells you that you are in the 30th percentile for blood pressure among us adults. what is your systolic bp? round to 2 decimal places.

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step-by-step explanation:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240