Write 0.642 in standard form

• 6.42 x 10^-1

• 6.42 x 10¹

• 6.42 x 10³

• 6.42 x 10³

Correct 62.6461 to two significant figures

• 6.35

•  63

• 62.65

• 62.7

Express 63025 in standard form.

• 6.3025 X 10⁴

• 6.3025 X 10³

•  6302.5 X 10¹

•  63025 X 10⁰

Convert 32_four to a number in base six

• 44_six

• 66_six

• 14_six

• 22_six

Simplify 8^-2/3  

• 1/8

• 4

• ¼

• 2

Factorize: p – bq + q – bp.

•  (p - q)(1 - b)

• (b + q)(b - 1)

• (p + q)(1 - b)

• (p + q)(1 + b)

Simplify;   4x+ 2y – 3x –y + 5y

• 7x – 7y

• 6x – y

• x + 6y

• x + 7y

If p = -3 and q = 6, evaluate p² – pq² – p³

• 144

• 107

• 103

• – 116

Let 10x and -2x be factors of -20x². Find the sum of the factors.

• 8x

• -12x

• 12x

• – 8x

Express 0.029646 correct to three decimal places.

• 0.030

•  0.029

• 0.02

• 0.03