3^(x) =
3^(x) = 50
Take logs base 10 (Calculator) of both sides
log3^(x) = log50
xlog3 = log50
x = log50/ log3 (NOT log (50/3))
On the calculator
x = 1.6987.../0.47712...
x = 3.5608....
50
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Such that log3(50), rounded to nine decimal places, is equal to 3.560876795, in the sum 3x=50, x, rounded to nine decimal places, is equal to 3.560876795.
50 x 10-3 = 0.05
Reflexivity is a property of equality, i.e., X = X is always true. Thus -7 raised to the power of 3 equals -7 raised to the power of 3 is true.
-40
3 x 104 equals 30,000
This is definitely false; if x=2 and y=3, x to the y power is 8, but y to the x power is 9, which are not equal.