Question

How do you calculate (7.2×10−2)(1.8×10−4)?

Answer 1

Heya Mate

$(7.2 \times 10 - 2)(1.8 \times 10 - 4) \\ \\ = \geqslant (72 - 2)(18 - 4) \\ \\ = \geqslant 70 \times 14 \\ \\ = \geqslant 980$