Simplify. Write answers without negative exponents. Assume that all variables represent nonzero real numbers.
A. 8x8
B. 42x8
C. 8x12
D. 8x5
Answer: A
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Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iz about the z-axis, where r(t) = (2 cos t)i + (2 sin t)j, 0 ? t ? 
; 
A. Iz = 32
B. Iz = 0
C. Iz = 8
D. Iz = 32
Quake 1 has a reading of 4.9 on the Richter scale. ? A: Quake 2 has a magnitude of 6.6. How do the relative intensities of quakes 1 and 2 compare? ? B: Quake 3 is 3,162.28 times as intense as quake 1. What is the magnitude of quake 3? ? C: An aftershock following quake 1 was one tenth as intense as quake 1. What was the magnitude of the aftershock? ? Round your answers to one decimal place.
What will be an ideal response?
Solve the problem.How many cuts are needed to divide a pole 16 feet into 2-foot sections?
A. 3 B. 7 C. 8 D. 2
Provide an appropriate response.Solve the system of equations using the substitution method: 3x + 5y = 51 y = 2x + 5
A. x = 9, y = 23
B. x = 2, y = 9
C. x = -
, y = 2
D. x = 3.54, y = 12.08