Convert the rectangular equation to a polar equation that expresses r in terms of ?.(x - 2)2 + y2 = 4
A. r = -4 sin ? + 4
B. r2 = 4 cos ?
C. r = 4 cos ?
D. r = 4 sin ?
Answer: C
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In April of 1986, the world's worst nuclear power disaster occurred at Chernobyl in the former USSR. An explosion released about 924 kilograms of radioactive cesium-137 (137 Cs) into the atmosphere. If the half-life of 137 Cs is 30.17 years, how much will remain in the atmosphere in 148 years? Round your answer to four decimal places. ?
A. 0.0000 kg B. 802.2442 kg C. 144.6880 kg D. 188.3586 kg E. 30.8289 kg
Use the given functions to find the requested function.f(x) = 6x + 5, g(x) = 4x2Find (g/f)(x).
A. 
B. 
C. 24x2 + 20x
D. 4x2 + 6x + 5
Graph the function.f(x) = 3 - ln x
A. 
B. 
C. 
D. 
Determine whether the relation represents a function. If it is a function, state the domain and range.
A. function domain:{18, 30, 42, 54} range: {3, 5, 7, 9} B. not a function C. function domain: {3, 5, 7, 9} range: {18, 30, 42, 54}