8 over 27
3^16 / 3^4 = 3^(16-4) = 3^12.
21 over 40 is irreducible as a fraction expression. 21 over 40 is 0.525 as a decimal expression.
4/5 times 9/2
It is an algebraic expression
Censorship
Yes, the stain may fade over time.
8 over 27
Dissolve
16
1/4
Yes, amethysts can fade over time when exposed to prolonged sunlight or heat.
Bleaching is not permanent, as the effects can fade over time.
5/x4
One to any power is still one. If the power is positive, you have 1 times itself over and over again, so it does not change. If the power is zero, the answer is always one, no matter the number. If the power is negative, you find the reciprocal of the expression and make the power positive. If the base of the exponential expression is 1, it is always one.
Yes, amethyst can fade when exposed to sunlight over time.
Yes, black mulch can fade over time due to exposure to sunlight and weather conditions.