From the bridge of a boot on the Niagara River, the angle of elevation of the top of
the Horseshoe Falls is 64. The angle of depression of the bottom of the Falls is 6
If the bridge of the boat is 2.8 m above the water, calculate the height of the
Horseshoe Falls, to the nearest tenth of a metre.

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

its 50 miles away from the starting point

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a