Solve. Round to the nearest hundredth, if necessary.According to Ohm's law, the electric current I, in amperes, in a circuit varies directly as the voltage V. When 17 volts are applied, the current is 4 amperes. What is the current when 21 volts are applied?
A. 89.25 amperes
B. 42 amperes
C. 4.25 amperes
D. 4.94 amperes
Answer: D
Mathematics
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Write the number in scientific notation.0.000936
A. 9.36 x 104 B. 9.36 x 10-4 C. 9.36 x 10-3 D. 9.36 x 10-5
Mathematics
Find the difference.
- 
A. 
B. - 
C. - 
D. 
Mathematics
Combine like terms.6xy - 4xy + 2
A. 2xy + 2 B. 4xy C. 2xy D. 10xy + 2
Mathematics
Solve the problem.The first recorded population of a particular country was 30 million, and the population was recorded as 38 million 8 years later. The exponential growth function 
describes the population of this country t years since the first recording. Use the fact that 8 years later the population increased by 8 million to find k to three decimal places.
A. 0.880 B. 0.040 C. 0.030 D. 0.260
Mathematics