Solve.If the voltage, V, in an electric circuit is held constant, the current, I, is inversely proportional to the resistance, R. If the current is 490 milliamperes when the resistance is 3 ohms, find the current when the resistance is 21 ohms.
A. 3430 milliamperes
B. 3423 milliamperes
C. 70 milliamperes
D. 210 milliamperes
Answer: C
Mathematics
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Provide an appropriate response.A community of rats begins with an initial population of 100 and grows 7% per month. Find the doubling time of the population. Round to the nearest month.
A. 16 months B. 23 months C. 9 months D. 10 months
Mathematics
Find the period of the function.y = 1.4 sin 
A. 
B. 1.4
C. 6
D. 6?
Mathematics
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.y = x2 - 49
A. vertex (0, -49)
x-int: (0, 0) and (7, 0)
y-int: (0, 0)
B. vertex (0, -49)
x-int: (0, 0) and (-7, 0)
y-int: (0, 0)
C. vertex (0, -49)
x-int: (-7, 0) and (7, 0)
y-int: (0, -49)
D. vertex (0, 49)
x-int: (-7, 0) and (7, 0)
y-int: (0, 49)
Mathematics
Simplify.
- 
A. 
B. 
C. 
D. 
Mathematics