By using data from the U.S. Bureau of Labor Statistics for the years 1968-2002, the purchasing power P of a 1983 dollar can be modeled with the function 
, where t is the number of years past 1960. Based on this model, what is the purchasing power of a 1983 dollar in the year 1970? Round your answer to the nearest cent.
?
A. $6.33
B. $2.30
C. $5.25
D. $19.03
E. $3.11
Answer: B
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (cos 5t)i + (4 sin t)j
A. a = (-5 cos 5t)i + (4 sin t)j B. a = (-25 cos 5t)i + (-4 sin t)j C. a = (-25 cos 5t)i + (-16 sin t)j D. a = (25 cos 5t)i + (-4 sin t)j
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Find the equation of the parabola satisfying the given conditions. The vertex is at the origin.Focus (0, -3)
A. y2 = -3x
B. y = - 
x2
C. y2 = -12x
D. x2 = -12y
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Multiply the rational expressions: 
a. 
b. 
c. 
d. 
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Find functions f and g so that h(x) = (f ? g)(x).h(x) = 
A. f(x) = 
, g(x) = 
B. f(x) = 
, g(x) = 86x2 + 29
C. f(x) = 86x2 + 29, g(x) = 
D. f(x) = 
, g(x) = x2
Mathematics