Question 3:

the figure below shows a shaded region and a nonshaded region. angles in the figure that appear to be right angles are right angles.

there's a rectangle with 2ft 16ft and 8ft. inside of the triangle, the shaded region is 8ft,2ft, 2ft, and 1ft

what is the area, in square feet, of the shaded region?
square feet

what is the area, in square feet, of the nonshaded region?
square feet

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.

How much would it be worth in 5, 10, 20 years

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr^2. write your answer in scientific notation.