Question

plz solve it as soon as possible

Answer 1

Answer:

-5.01 * 10⁻⁹

Step-by-step explanation:

2.89 * 10⁻⁹ - 7.9 * 10⁻⁹

= 10⁻⁹(2.89 - 7.9)

= -5.01 * 10⁻⁹