Question

Approximately how many times greater is 2.3x10^-4 than 1.15x10^-8 ?

A: 115
B:200
C:11,500
D:20,000

Answer 1

2.3 ×
`10^(-4)` is 20,000 times greater than 1.15 ×
`10^(-8)`

Explanation:

Given as :

The first number= x = 2.3 ×
`10^(-4)`

The second number= y = 1.15 ×
`10^(-8)`

Let The first number is z times greater than second number

i.e x = z × y

Or, z =
`(x)/(y)`

Or, z =
`(2.3* 10^(-4))/(1.15* 10^(-8))`

Or, z = 2 ×
`10^(4)`

∴ z = 20,000

So,The first number is 20,000 times greater than second number

Hence, 2.3 ×
`10^(-4)` is 20,000 times greater than 1.15 ×
`10^(-8)` . Answer