A pull cord for a lighted ceiling fan is swinging back-and-forth. The end of the cord swings a total distance of 5 inches from end to end and reaches a speed of 6.8 inches/sec at the midpoint. Find the period of oscillation, round your answer to three decimal places.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

22

step-by-step explanation:

22