**New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 8 Powers (Exponents) Self Practice 2b Solution**

**(1) Find each value**

(a) 10^{-4}

(b) 10^{-7}

(c) 10^{-8}

(d) 10^{-10}

**(2) Write each number in scientific notation.**

(a) 5,700,000

(b) 8,19,000

(c) 4,000,000,000

(d) 56,000

**(3)** (a) 0.000053

(b) 0.000000084

(c) 0.0009

(d) 0.0603

**SOLUTION Number 1,2 & 3:**

**Write each number in standard form.**

**(4)** (a) 5.7 x 10^{3}

(b) 6.39 x 10^{5}

(c) 1.71 x 10^{6}

(d) 4.0 x 10^{9}

(e) 7.02 x 10^{4}

**(5)** (a) 9.4 x 10^{-4}

(b) 2 x 10^{-3}

(c) 5.01 x 10^{-2}

(d) 3.88 x 10^{-1}

(e) 3.7 x 10^{-9}

**(6) Write the following facts in scientific notation.**

(a) The distance from the earth to the sun is 149600000000 m.

(b) the average diameter of a red blood cell is 0.000007 mm.

(c) Diameter of a wire in a computer chip is 0.000003 m.

(d) Size of a plant cell is 0.00001275 m.

**SOLUTION Number 4,5 & 6:**

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