Math Project

Answer all the questions in the attached worksheet and please show all work! Please do it on something online and not on paper, hard to attach each picture to a document and turn in and just looks weird.

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Unit 5 Project
1. A projectile is fired upward from the ground with an initial velocity of 300 feet per
second. Neglecting air resistance, the height of the projectile at any time t can be
described by the polynomial function P(t) = ­16t2 300t
a. Find the height of the projectile when t = 1 second.
b. Find the height of the projectile when t = 5 seconds.
c. How long will it be until the object hits the ground?
2. A board has length (3×4 6×2 ­ 18) meters and width of 2x 1 meters. The board is cut
into three pieces of the same length.
a. Find the length of each piece.
b. Find the area of each piece.
c. Find the area of the board before it is cut.
d. How is the area of each piece of the board related to the area of the board
before it is cut?
3. A cubic equation has zeros at ­2, 1, and 3.
a. Write an equation for a polynomial function that meets the given conditions.
b. Draw the graph of a polynomial function that meets the given conditions.
4. Alice was having a conversation with her friend Trina, who had a discovery to share:
Pick any two integers. Look at the sum of their squares, the difference of their squares,
and twice the product of the two integers you chose. Those three numbers are the
sides of a right triangle.
a. Write an equation that models this conjecture using the variables x and y.
b. Investigate this conjecture for at least three pairs of integers. Does her trick
appear to work in all cases, or only in some cases? Explain.
c. Use Trinaâ??s trick to find an example of a right triangle in which all of the sides
have integer length, all three sides are longer than 100 units, and the three side
lengths do not have common factors.
BONUS: If Trinaâ??s conjecture is true, use the equation found in part a to prove the
conjecture. If it is not true, modify it so it is a true statement, and prove the new

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