Solve.x2 = 81
A. 40.5
B. -9, 9
C. -10, 10
D. 9
Answer: B
You might also like to view...
Fill in the blank with the appropriate symbol, ? or ? .
________ {x|x is a rational number}
A. ? B. ?
The number S of species of birds on an island is given approximately by
,
where A is the area, in square kilometers, of the island that is usable for birds.A: If a conservation program is able to increase the usable area by 25%, how is the number of species affected? Express your answer in terms of a percent.B: If a natural disaster reduces the usable area of the island by 23%, how is the number of species affected? Express your answer in terms of a percent.C: If the number of bird species is 54, and the usable area is 218 square kilometers, find the value of c.
?
Round your answers to two decimal places if necessary.
?
What will be an ideal response?
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = ln(t3 - 6t2 + 1)i - 
j - 1cos(t)k
A. v(0) = 
j
B. v(0) = 1i - 
j
C. v(0) = 1i - 
j + 1k
D. v(0) = - 
j
Solve.The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 
when the length is 
what is the period when 
A. 1.0 s B. 4.8 s C. 1.4 s D. 5.0 s