# How do you evaluate the expression n^4 when n=7 and when n= 0.4?

When $n = 7$, ${n}^{4} = {7}^{4} = 7 \cdot 7 \cdot 7 \cdot 7 = 2401.$
Similarly, when $n = 0.4$, ${n}^{4} = {\left(0.4\right)}^{4} = \left(0.4\right) \cdot \left(0.4\right) \cdot \left(0.4\right) \cdot \left(0.4\right) = 0.0256 .$
When $n = 7$, ${n}^{4} = {7}^{4} = 7 \cdot 7 \cdot 7 \cdot 7 = 2401$
Similarly, when $n = 0.4$, ${n}^{4} = {\left(0.4\right)}^{4} = \left(0.4\right) \cdot \left(0.4\right) \cdot \left(0.4\right) \cdot \left(0.4\right) = 0.0256 .$