On average, the mass of each egg in a tray is 57.2 grams to the nearest tenth of a gram.
(a) Write down the lower bound for the mass.

(b) There are 30 eggs in the tray.
Calculate an estimated upper bound for the mass of all eggs in the tray.

By rounding each of the value to 1 significant figure, estimate $\frac{5.112\times 39.997}{0.199}$.

(a) The number of people at a football match is 27359.
Write the number to one significant figure.

(b) The number of people who sat in stand A is 2500 correct to two significant figures.
Find the largest number of people that could have sat in stand A.

(a) By first rounding each value to one significant figure, estimate the value of $\frac{33.94\times {\left(0.00772\right)}^{\frac{1}{3}}}{1.76}$.

The number of students at a college is 1719.
Write this number correct to:
(a) The nearest 10,

(b) Two significant figures.

By making suitable approximations, estimate $\frac{23.566\times {\left(5.367\right)}^2}{14.788}$.