Answer:
2415
Step-by-step explanation:
y=2415
PREMISES
y=(3^-4+5^-3)^-2
CALCULATONS
y=(3^-4+5^-3)^-2
y=(1/3^4+1/5^3)^-2
y=(1/81+1/125)^-2
The least common multiple LCM(81, 125)=81*125=10125 since no common prime factors exist
hence,
y=(125/10125+81/10125)^-2
y=[(125+81)/10125]^-2
y=(206/10125)^-2 [Express a/b as a decimal fraction]
y=(0.020345679)^-2
y=1/(0.020345679)^2
y=1/0.000414 to 6d. p
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