4. Express the answers to the following problems in scientific notation. Hint: Use the subtraction example to solve the addition problem. A. (1.8 X 1020) X (2.5 X 10^16) C. (9.2 X 10^19) ÷ (3.0 X 10^7) B.(7.9 X 10^9) - (6.0 X 10^8) D. (4.2 X 10^9) + (8.0 X 10^18)​

see below

Explanation:

A. (1.8 X 10^20) X (2.5 X 10^16)

= 4.5 x 10³⁶

B.(7.9 X 10^9) - (6.0 X 10^8)

= 7.3 x 10⁹

C. (9.2 X 10^19) ÷ (3.0 X 10^7)

= 3.067 x 10¹²

D. (4.2 X 10^9) + (8.0 X 10^18)​

= 8.00000002042 x 10¹⁸

## Express each of the following numbers using exponential notation

Express each of the following number using exponential notation (i) 512 (ii) 343 (iii) 729 (iv) 3125​

Topic - 1- Polynomials 1.Which of the following expressions are polynomials ? Justify your answer(I) 8(II) √3x^2-2x(III)1-√5x (IV)1/5x^-2+5x+7 (V)(x-2)(x-4)/x (VI)1/x+1 (VII) 1/7 a^3-2/√3a^2+4a-7 (VIII)1/2x​

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