1) a rectangular swimming pool with length b and width h is surrounded by a walkway which is 3 feet wide. which equation below could be used to find the area of the walkway?

a) a=(b+6)(h+6)-bh

b) a=bh-(b+6)(h+6)

c) a=(b+3)(h+3)-bh

d) a=(b+6)(h+6)

2) the following table is an example of inverse variation.

x y

4 48
6 32
8 24
16 12

which equation models the relationship between x and y?

a) x=4/3 y

b) x=y/192

c) y=192/x

d) y=12x

3) the distance d that an object travels in t seconds is given by the formula d=1/2 at^2 , where a is the acceleration of the object. which of the following expresses a in terms of d and t?

a) a=2dt^2

b) a= dt^2/2

c) a= d/2t^2

d) a= 2d/t^2

for your : )

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec