Fill the appropriate number :
`( 4/5 ) times ---- = 1`

Solve the following to the appropriate number of significant figures : (i) 0.58 + 324.65 (ii) 3.124 xx 4.576 (iii) (324 xx 0.08666)/(5.006) (1.35 xx 10^(-6) xx 0.4 )/(5.6) (v) (2.03 xx 10^(-5) xx 3.5 xx 10^(-7))/(0.6423) (vi) sqrt(3.5 - 3.31)

Express the result of the following data to the appropriate number of significant figures. (4.84 xx 0.0744)/(0.016)

Simplify and round to the appropriate number of significant digits (a) 16.235 xx 0.217 xx 5 (b) 0.00435 xx 4.6

Solve the following expressions and express the result to an appropriate number of significant figures : (i) 65.5xx135.1xx0.61 (ii) (4.23xx25.68)/(658.2) (iii) (3.51xx10^(-4)xx2.71xx10^(7))/(0.5562) .

Fill in the blanks with appropriate items : A radioactive substance decays 20% in 10 min if at start there are 5 xx 10^(20) atoms present , after ________ hour the number of atoms will be reduced to 10^(18) .

Perform the following calculations to the appropriate number of signficiant digits (6.02xx10^(23)xx4.00)/(4.0xx10^(20))

Perform the following calculations to the appropriate number of signficiant digits 2.6xx10^(3)+2.4xx10^(2)-1.4xx10^(2)

Subtract 4.5xx10^(4)" from "7.9xx10^(5) and express the result to an appropriate number of significant figures.

Fill in the blanks : 1 . (-8 ) + --- = - 8 2. (-3 ) + 5 = --- + ( -3 ) 3. ( -5 ) times --- = (-5 ) 4 . (-4 ) times --- = 0 5 . (-3 ) times --- = 3

Fill in the blanks with an appropriate word. The number of books ...... increasing. (is/are)