A candle burns at a constant rate of 2.5cm/h. The candle is 15cm tall when it is first lit. Let "t" represent the time is it burning in hours and let "h" represent the height of the candle in centimetres. a) Should the slope of this relationship be positive or negative? Explain your reasoning. b)What is the equation for this problem? c)What is the height of the candle after 3 hours? d)What is the t-intercept (when h=0)? Explain what this means in real-life. e)Explain why this graph has no meaning below the t-axis, nor behind the h-axis.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed

For the right triangle shown, the lengths of two sides are given. find the third side. leave your answer in simplified, radical form.

On which number line are -3 and its opposite shown