An economist predicts that the buying power B(x) of a dollar x years from now will decrease according to the form $B ( x ) = 0.51 ^ { x }$ . How much will today's dollar be worth in 7 years? Round the answer to the nearest cent.
A) $3.57
B) $2.70
C) $0.62
D) $0.01

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The Answer of An economist predicts that the buying power B(x) of a dollar x years from now will decrease according to the form $B ( x ) = 0.51 ^ { x }$ . How much will today's dollar be worth in 7 years? Round the answer to the nearest cent.
A) $3.57
B) $2.70
C) $0.62
D) $0.01

An Economist Predicts That the Buying Power B(x) of a Dollar