Rewrite the expression with a rational exponent.
A. 
B. 951/3
C. 
? 95
D. 953
Answer: B
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Solve the problem.The position of a particle moving along a coordinate line is s = 
with s in meters and t in seconds. Find the particle's acceleration at 
A. - 
m/sec2
B. 
m/sec2
C. - 
m/sec2
D. 
m/sec2
Find the foci of the ellipse whose equation is given.
+ 
= 1
A. foci at (3, -2 - 3
) and (3, -2 + 3
)
B. foci at (-2, -2 - 3
) and (-2, -2 + 3
)
C. foci at (2, -2 - 3
) and (2, -2 + 3
)
D. foci at (-2, 2 - 3
) and (-2, 2 + 3
)
Show that the function 
is concave upward wherever it is defined.
?
A. The function 
is defined for any value of x and 
hence the function is concave upward for any x.
B. The second derivative of 
is 
. It is positive for any value of x, hence the function is concave upward for any x.
C. The first derivative of 
is 
. It is positive for any value of x, hence the function is concave upward for any x.
Perform the indicated operations. Be sure to simplify your answer.
+ 
A. 
B. 
C. 
D. 