A ladder of length 4 metres leans against a wall that is 2.8 metres high. The foot of the ladder is 1.2 metres from the base of the wall.

The length of the ladder above the wall is marked x in the diagram.

Work out the value of x.

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Abakery recorded the number of muffins and bagels it sold for a seven day period. for the data presented, what does the value of 51 summarize? a) mean of bagels b) mean of muffins c) range of bagels d) range of muffins sample # 1 2 3 4 5 6 7 muffins 61 20 32 58 62 61 56 bagels 34 45 43 42 46 72 75

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true