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Maths-

General

Easy

Question

Evaluate 8.6 × 10^-4 - 4.2 × 10^-7

hint Hint:

In Mathematics, lets say, "a" represents a number and "n" is the number of times that number is to be multiplied with itself, in order to get a desired result. Then, such result can be written as an, where a is called the base and n is its power/ exponent.
an = a × a × ... × a n times.

The correct answer is: Simplifying the given expression, we get- 0.000859958 or 8.59958 × 10-4.

Step-by-step solution:-
8.6 × 10^-4 - 4.2 × 10^-7
= 0.00086 - 0.000000042
= 0.000859958
= 8.59958 × 10^-4
Final Answer:-
∴ Simplifying the given expression, we get- 0.000859958 or 8.59958 × 10^-4.

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