The top view and side view of a 40-foot-long swimming pool are shown in the figure below. All dimensions given are in feet. -60
40
top view
20
12
side view
The top view shows the top rectangular surface of the pool and the surrounding rectangular patio. All 4 walls of the pool are
vertical and perpendicular to the top surface. The side view shows a cross section along the length of the pool. All cross
sections parallel to the side view are congruent. The shallow end has a constant depth of 4 ft. The deep end has a constant
depth of 9 ft. A rectangular surface connects the shallow and deep ends.
What is the area, in square feet, of the patio surrounding the pool?
500
600
Oa
Ob
Ос
Od
Oe
900
1,100
1,350
O

Is of - 4x + 2? a. 3 b. 4 c. 6 d. 5

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.