Solve the following problems: Problem 13: Omondi calculated the total area of a figure as 15.996 ha. Round off the number to the nearest hundredths. Problem 14: The figure below represents a bicycle w

In the number 15.996, the digit in the hundredths place is the second '9' after the decimal point.

The digit in the thousandths place is '6'.

Since '6' is 5 or greater, we round up the digit in the hundredths place.
Rounding '9' up means it becomes '10'. This carries over to the tenths place.
The tenths digit '9' also becomes '10', which carries over to the ones place.
The ones digit '5' becomes '6'.
So, 15.996 rounded to the nearest hundredths is 16.00.
The rounded number is $\boxed{16.00 \text{ ha}}$.

:
The figure below represents a bicycle wheel of radius $14 \text{ cm}$. Calculate its circumference.

The radius ($r$) of the bicycle wheel is $14 \text{ cm}$.

The circumference ($C$) of a circle is given by the formula $C = 2\pi r$. We will use $\pi = \frac{22}{7}$.

The circumference of the bicycle wheel is $\boxed{88 \text{ cm}}$.