Simplify:
\(\left[\left(7 \frac{1}{4}\right)^2-\left(5 \frac{4}{5}\right)^2\right] \div 5 \frac{4}{5} \times \frac{16}{9}\)
1
9.3
2
7.4
3
5.8
4
3.1
Simplify:
\(\left[\left(7 \frac{1}{4}\right)^2-\left(5 \frac{4}{5}\right)^2\right] \div 5 \frac{4}{5} \times \frac{16}{9}\)