Find the indicated sum.3 + 6 + 9 + . . . + 120
A. 4920
B. 2460
C. 4797
D. 2398
Answer: B
Mathematics
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Insert the correct sign of inequality (> or <) between the given numbers.-8 -1
A. -8 < -1 B. -8 > -1
Mathematics
Solve the problem.When an alternating current passes through a series RLC circuit, the voltage and current are out of phase by angle ?. Here ? = tan-1[(XL - XC)/R], where XL and XC are the reactances of the inductor and capacitor, respectively, and R is the resistance. Find d?/dR for constant XL and XC.
A. 
B. 
C. 
D. 
Mathematics
- 
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Using ?ABC~?AED, find the length of DE.
A. 
B. 48
C. 15
D. 9.6
Mathematics