Question 1016995
A) P = 0.007(40)^2 -0.03(40) + 122
P = 132.0
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Systolic blood pressure for age 40 is 132.0mm Hg
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B) 132.54 = 0.007y^2 -0.03y +122
0.007y^2 -0.03y -10.54 = 0
:
use quadratic formula to solve for y
;
y = (-(-0.03) + sqrt((0.03)^2−4*0.007*(−10.54))) / (2(0.007)) = 41.005514286
y = (-(-0.03) - sqrt((0.03)^2-4*0.007*(-10.54))) / (2(0.007)) = −36.7198
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Note that * means multiply
:
we accept the positive value for y and reject the negative value
:
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The person's age for 132.54mm Hg systolic pressure is 41 years
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