Question

about how much energy did china and the united states consume in 2010? which of these expressions is equivalent to (1×10^{20})+(1×10^{20})? primary energy consumption for top 5 countries in 2010

country	energy consumed in 2010 (joules)
u.s.	1.03×10^{20}
russia	3.09×10^{19}
india	2.31×10^{19}
japan	2.30×10^{19}

(1 + 1)×(10^{20}+10^{20})
(1 + 1)×10^{20}
(1 + 1)×10^{20 + 20}

Explanation:

Step1: Apply distributive property

According to the distributive property \(a\times c + b\times c=(a + b)\times c\). Here \(a = 1\), \(b = 1\) and \(c=10^{20}\), so \((1\times10^{20})+(1\times10^{20})=(1 + 1)\times10^{20}\).

Answer:

\((1 + 1)\times10^{20}\)