Circle O is shown. Secant K L intersects tangent K J at point K outside of the circle. Tangent K J intersects circle O at point M. Secant K L intersects the circle at point N. The measure of arc M N is 62 degrees. The measure of arc M L is 138 degrees.
Shondra wants to find the measure of angle JKL. Her work is started. What is the measure of angle JKL?

m∠JKL = One-half (138 – 62)
m∠JKL =
°

Alarge rectangle is divided into four smaller rectangles.

What is the maximum total area that 450cm of string can enclose if it is used to form perimeters of two adjoining rectangles as shown?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.