the curve y = f(x), when f(x) is a quadratic expression has
a maximum value point at (1,4). The curve touches the line
6x + y = 13. Find the value of x for which y = 8
A particle P is projected from a point O at the edge of a cliff 60m
from the sea with a velocity of 30ms^(−1) . When P is at a point B
where OB is a horizontal, another particle Qsuch that
P and Q hit the sea simultaneously at thesame point A. Gven that they
strike the sea 6seconds after P was fired ^ calculate
a) the sine of the angle of elevation of projection.
b) the distance from A to O.
c) the time of flight of Q.
d) the Range .
(take g = 10ms^(−2) )
please help