Multiply and write the result in standard form.(6 + 8i)(6 - 8i)
A. 36 - 64i2
B. 36 + 64i2
C. -28
D. 100
Answer: D
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.r(t) = (7 ln(4t))i + (6t3)jFind the acceleration vector.
A. a(t) = 
i + 18tj
B. a(t) = - 
i + 36tj
C. a(t) = - 
t-2i + 36tj
D. a(t) = 
t-2i + 36tj
Mathematics
Find the variance of the probability density function to the nearest hundredth.f(x) = 
; [0, 5]
A. 2.08 B. 2.09 C. 1.04 D. 0
Mathematics
Find the sum.
A. -2445 B. -2220 C. -2370 D. -2325
Mathematics
For problems 1-12, use the zero product property to solve each equation.
A. 
B. 
C. 
D. 
E. no solution
Mathematics