DeMorganize the following:
Ä Ä Ä
A + B + C.
ABC
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Use scientific notation to solve the problem.How many liters of oil are needed to supply the electrical energy needs of an average U.S. home for 10 weeks? Assume that the energy released by burning one liter of oil is 1.2 × 107 joules and that the electrical energy used daily in an average U.S. home is 5 × 107 joules. Round your answer to the nearest tenth of a liter.
A. 291.7 liters B. 2.4 liters C. 16.8 liters D. 41.7 liters
Solve.In a state with a population of 9,000,000 people, the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Write your answer in scientific notation.
A. $5.4 × 1010 B. $5.4 × 109 C. $54 × 1010 D. $54 × 1011
Evaluate the exponential expression.(-4)2
A. 4 B. -4 C. -16 D. 16
Identify the fraction as proper or improper.
A. proper B. improper