Question

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

Answer 1

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

Step-by-step explanation:

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

We are given:

x = $4\times 10^{15}$

y = $19\times 10^{12}$

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

$\frac{x}{y}=\frac{4\times 10^{15}}{19\times 10^{12}}\\\\\frac{x}{y}=0.2\times 10^3\\\\x=200y$

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