CPM Homework Help : A2C Problem 9-80

Solve each equation.

$5.2\left(3.75\right)^{x} = 100$
Hint (a):
Divide by $5.2$ and then use logarithms.
Answer (a):
$x ≈ 2.24$

$4 + 3x^{4} = 81$
Hint (b):
Use roots or fractional exponents.
Answer (b):
$\textit{x}=\pm\sqrt[\text{4}]{\frac{77}{3}}\approx\pm2.25$