Mathematics form 3 -standard form

0.001603 is written as 1.603 X 10ⁿ in the standard form. State the value of n.

• 2

• 3

• 4

• 5

Find the product 0.0389 X 0.7. Round off the answer correct to two significant figures.

• 0.027
• 0.028
• 0.03
• 0.02

Diagram 1 shows a net of a cuboid. The cuboid has a square base and the height is twice the length of the side of its base.
Given the total area of the net is 360 cm². Calculate the volume in m³ of the cuboid.

• 2.16 X 10^-4
• 4.32 X 10^-4
• 2.16 X 10²
• 4.32 X 10

• 340000

• 340

• 3400

• 34000

• 5.4 × 10^-4

• 54 × 10⁵

• 5.4 × 10⁵

• 5.4 × 10⁴

• 8.9 × 10^-4

• 0.89 × 10^-4

• 8.9 × 10^-3

• 0.0089 × 10^-3

State the number of significant number of the following number

• 1 significant figure

• 2 significant figure

• 5 significant figure

• 7 significant figure

Round off 4.028 correct to three significant figures.

• 4.02

• 4.020

• 4.03

• 4.030

Express 4785.2 in standard form.

• 4.7852 x 10²

• 4.7852 x 10^-2

• 4.7852 x 10³

• 4.7852 x 10^-3

Find the standard form value of (2.5 x  $10^4$  ) x ( 6 x  $10^{-9}$  )

•  $15\ \times10^{-5}$  

•  $15\ \times10^{-4}$  

•  $1.5\ \times\ 10^{-4}$  

•  $1.5\ \times\ 10^{-6}$