Consider the following equalities.

(i) $3 \times 10^{6}+5 \times 10^{2}=8 \times 10^{8}$

(iii) $5 \times 8+7=75$

(ii) $2^{3}+2^{-3}=2^{0}$

(iv) $5+5 \div 5=2$

Which one is correct?
(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)
(e) None
The correct option is (e).

None of the equalities are correct.

(i) Incorrect: $3 \times 10^{6}+5 \times 10^{2}=3000000+500=3000500 \neq 8 \times 10^{8}$.

(ii) Incorrect: $2^{3}+2^{-3}=2^{3}+\frac{1}{2^{3}}=8+\frac{1}{8} \neq 1=2^{0}$.

(iii) Incorrect, multiplication precedes addition: $5 \times 8+7=40+7=47 \neq 75$.

(iv) Incorrect, division precedes addition: $5+5 \div 5=5+1=6 \neq 2$.