Bunuel wrote:
The microcurrent through the electrode in a delicate circuit is usually held constant at 3.6∗10(−8) amps. Because of a defect in another part of the circuit, the current was 1,000 times smaller. What was the current, in amps, caused by this defect?
A. 3.6∗10(−8000)
B. 3.6∗10(−24)
C. 3.6∗10(−11)
D. 3.6∗10(−5)
E. 3.6∗10(−83)
Key concept #1: If X is 1000 times smaller than Y, we can write: X = Y/1000Key concept #2: abc=(a)(bc)So, the measure of the resulting current =
3.6∗10(−8)1000Rewrite as:
3.6∗10(−8)103Use Concept #2 to rewrite as:
(3.6)10(−8)103Apply Quotient Law for exponents to get:
(3.6)(10(−8−3))Simplify:
(3.6)(10(−11))Answer: C
Cheers,
Brent