Question

Estimate how many times larger 4 x 1015 is than 19 x 1012.

A)
20 times larger
B)
50 times larger
C)
100 times larger
D)
200 times larger

Answer 1

Answer: The first number is 200 times greater than second number.

Explanation:

Let the first number be 'x' and second number be 'y'

We are given:

x =
`4* 10^(15)`

y =
`19* 10^(12)`

To calculate the times, number 'x' is greater than number 'y', we divide the two numbers:

`(x)/(y)=(4* 10^(15))/(19* 10^(12))\\\\(x)/(y)=0.2* 10^3\\\\x=200y`

Hence, the first number is 200 times greater than second number.

Answer 2

(4·10¹⁵)/(19·10¹²) ≈ (4/20)·10³ = 0.2·1000 = 200

The appropriate choice is ...
D) 200 times larger