Write the expression using a single radical sign. Assume that all variables represent positive real numbers. Simplify the radicand if possible.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 1 + 5 cos tFind the body's velocity at time t = ?/3 sec.
A. - 
m/sec
B. 
m/sec
C. 
m/sec
D. - 
m/sec
Mathematics
Give the value of the indicated trigonometric function of a vector with the indicated end point.(6, 8); Find cos ?.
A. 
B. 
C. 
D. 
Mathematics
Solve the equation using the quadratic formula.
x2 + 
x + 
= 0
A. 
B. No real solution
C. - 
D. 
Mathematics
Approximate the square root. Round to the nearest tenth, if needed.
A. 15.5 B. 15.2 C. 15.4 D. 15.3
Mathematics