Question

1. Give the value of 7 ÷ 9 to 3 significant figures.

2. Multiply 2.45 by 10 and add 67.3 to the result

3. Express 0.004578: 2
a) correct to three decimal places
b) correct to three significant figures

4. If a piece of wire is 1.5 metres how many pieces can we make from 75 metres of wire?

5. Wheat was sold at TK 94.80 per Kg, and the gain was TK 8.20. What was the cost price of the
wheat?

6. Cricket bats cost TK 220.20 each or TK 800 for four. How much do you save by buying four?

Answer 1

Answer:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. Wikipedia

Answer 2

Answer:

1.

$0.\frac{}{77}$

2.67.545

3.?

4.112.5

5.?

6.?

sorry I tried. :-(

:'(