Q15 of 49 Page 12

If , find the value of x.

Given,

We know that,

25 = 5 × 5 = 5²

125 = 5 × 5 × 5 = 5³

= 5³ = 5^{[(2x+1) -2]} = 5³

5^[(2x+1)-2] = 5^[2x-1] = 5³

= 2x - 1 = 3

2x = 3 + 1 = 4

∴ x = 2

By what number should be multiplied so that the product may be?

By what number should be divided so that the quotient may be?

The distance from the earth to the sun is 149600000000 m. Write it in standard form.

Mass of earth is (5.97 x 10²⁴) kg and mass of moon is (7.35 x 10²²) kg. What is the total mass of the two?