Find all the real zeros of the polynomial. Use the quadratic formula if necessary.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: D
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Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 400e-0.092t, where t is the time in years? Round to the nearest hundredth year.
A. 36.80 yr B. 7.53 yr C. 72.66 yr D. 65.12 yr
Find the mean.27, 34, 16, 30, 13, 34, 14
A. 27 B. 24 C. 21 D. 34
Provide an appropriate response.When comparing electrical usage among utility customers, a small standard deviation indicates that the mean:
A. shows that electrical usage is decreasing B. is a typical value in the data set C. shows that electrical usage is increasing D. is not a typical value in the data set
Solve the problem. Leave your answer in polar form.z = 10(cos 45° + i sin 45°)w = 5(cos 15° + i sin 15°)Find zw.
A. 50(cos 30° + i sin 30°) B. 5(cos 30° + i sin 30°) C. 5(cos 60° + i sin 60°) D. 50(cos 60° + i sin 60°)