# Ex 13.3, 4 (f) - Chapter 13 Class 7 Exponents and Powers

Last updated at Sept. 7, 2021 by Teachoo

Last updated at Sept. 7, 2021 by Teachoo

Transcript

Ex 13.3, 4 Express the number appearing in the following statements in standard form. (f) The universe is estimated to be about 12,000,000,000 years old. 12,000,000,000 = 12 × 〖10〗^9 = (1.2 × 10) × 〖10〗^9 = 1.2 × 〖10〗^1 × 〖10〗^9 = 1.2 × 〖10〗^(1 + 9) = 1.2 × 〖10〗^10 Answer is 1.2 × 〖𝟏𝟎〗^𝟏𝟎 years (Using am × an = am + n)

Ex 13.3

Ex 13.3, 1
Important

Ex 13.3, 2 (a)

Ex 13.3, 2 (b)

Ex 13.3, 2 (c)

Ex 13.3, 2 (d)

Ex 13.3, 3 (i) Important

Ex 13.3, 3 (ii)

Ex 13.3, 3 (iii)

Ex 13.3, 3 (iv)

Ex 13.3, 3 (v)

Ex 13.3, 3 (vi)

Ex 13.3, 4 (a)

Ex 13.3, 4 (b)

Ex 13.3, 4 (c)

Ex 13.3, 4 (d)

Ex 13.3, 4 (e)

Ex 13.3, 4 (f) You are here

Ex 13.3, 4 (g)

Ex 13.3, 4 (h)

Ex 13.3, 4 (i)

Ex 13.3, 4 (j)

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