Question

3:26. A ball is thrown into the air so that its height, h, in feet after / seconds is given by
the equation h= 144r - 1617.
a. Find the number of seconds that the ball is in the air when it reaches a height
.
of 180 feet
b. After how many seconds does the ball hit the ground?
27. The price of stock A varied over a 12-month period according to the function
A()=0.750 - 6x + 20, where AQ) represents the price of stock A after x months
Over the same 12-month period, the price of stock B varied according to the func.
tion B(x) = 2.75 +1.50. Using graphical methods, determine the prices, to the
nearest cent, but which both stocks had the same value.
28. The manufacturing of a metal box starts with a rectangular sheet of metal that is
three times as long as it is wide. Four equal squares are cut from the four comers,
and the flap at each comer is turned up to form a box 2 inches high that is open at
the top. What should be the width of the rectangular sheet of metal in order for the
box to have a volume of 102 cubic inches!!​

Answer 1

$\large\mathbf\red{ANSWER \: :}$

3:26. A ball is thrown into the air so that its height, h, in feet after / seconds is given by

the equation h= 144r - 1617.

a. Find the number of seconds that the ball is in the air when it reaches a height

.

of 180 feet

b. After how many seconds does the ball hit the ground?

27. The price of stock A varied over a 12-month period according to the function

A()=0.750 - 6x + 20, where AQ) represents the price of stock A after x months

Over the same 12-month period, the price of stock B varied according to the func.

tion B(x) = 2.75 +1.50. Using graphical methods, determine the prices, to the

nearest cent, but which both stocks had the same value.

28. The manufacturing of a metal box starts with a rectangular sheet of metal that is

three times as long as it is wide. Four equal squares are cut from the four comers,

and the flap at each comer is turned up to form a box 2 inches high that is open at

the top. What should be the width of the rectangular sheet of metal in order for the

box to have a volume of 102 cubic inches!!