Find the area under the normal curve.Find the percent of the area under a normal curve between the mean and 2.41 deviations from the mean.
A. 49.18%
B. 49.20%
C. 99.20%
D. 50.80%
Answer: B
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It makes sense that the larger the area of a region, the larger the number of species that inhabit the region. Many ecologists have modeled the species-area relation with a power function and, in particular, the number of species S of bats living in caves in central Mexico has been related to the surface area A measured in 
of the caves by the equation
S = 0.7A03
(a) The cave called mission impossible near puebla, mexico, has suface area of A=90m2.
How many species of bats would expect to find in that cave?
(b) If you discover that 5 species of bats live in cave estimate the area of the cave.
Solve.2x2 + y2 = 33x2 - y2 = 37
A. (-2
, -
), (-2
, 
), (2
, -
), (2
, 
)
B. (-2
, -i
), (-2
, i
), (2
, -i
), (2
, i
)
C. (-2
, i
), (2
, i
)
D. (2
, -i
), (2
, i
)
In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.a = 1 ft, c = 30 ft
A. b ? 31 ft B. b ? 30.0 ft C. b = 29 ft D. b ? 5.4 ft
Solve the problem.If an object is dropped off of a tower, the velocity, V, of the object after t seconds can be obtained by multiplying t by 32 and adding 10 to the result. Express V as a linear function of t.
A. V(t) = 
B. V(t) = 32t + 10
C. V(t) = 42t
D. V(t) = 32 + 10t