The pendulum on a grandfather clock moves with simple harmonic motion, according to the equation y = 7 cos 0.81t, where y is in centimetres and t is in seconds. Find the displacement when t = 23 s. Your calculator must be set to radians.​

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

c: lkllmn.

hope it's you

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40

the radius is 2 times the diameter.

step-by-step explanation: