Sabrinna's+page

Sabrina

**Phase 1** 


 * Yang Hui:** Yang Hui was born in the 13th century and was most famous for the Pascal Triangle. His teacher was Lui I . Little is know about Yang Hui and his education but he was born in Chekiang providence, so I'm guessing that this is where he was educated. He also wrote many outstanding mathematical texts, some of them being Xiangjie jiuzhang suanfa and // Jiuzhang suanshu. //


 * Abraham bar Hiyya Ha-Nasi:** Abraham bar Hiyya Ha-Nasi was born in the 11 century in Barcelona spain, and is know for the writing of the quadratic equation in its current form. Abraham bar Hiyya Ha-Nasi was Spanish jewish mathematician astronomer and philosopher also known as Savasorda which in Arabic means "Chief of the Guard". This would mean that he had some kind of power in the Muslim administration of Barcelona.

** Phase 2 **

1. Suppose a farmer has 2600 yards of fencing to enclose a rectangular field. What is the largest area that the farmer can enclose? (10 points) 2. The owner of a ranch decides to enclose a rectangular region with 440 feet of fencing. To help the fencing cover more land, he plans to use one side of his barn as part of the enclosed region. What is the maximum area the rancher can enclose? (10 points)  3. A farmer wishes to enclose a rectangular region bordering a river using 3700 feet of fencing. He wants to divide the region into two equal parts using some of the fence material. What is the maximum area that can be enclosed with the fencing? (10 points)

Part two of Phase 2 is to solve the problems that involve projectile in motion. The formula you will be using to solve these problems is below: s(t) = –gt2 + v0t + h0 Describe what the letters g, t, v and h represent. (5 points) Here is a website that will help: []

G=Acceleration due to gravity V=represents initial velocity T= represents time in seconds after the projectile is released H=represents the projectile's instantaneous height

1. Some fireworks are fired vertically into the air from the ground at an initial velocity of 100 feet per second. Find the highest point reached by the projectile just as it explodes.  

The highest point 156.24 feet in the air.

2. A ball is thrown vertically upward with an initial velocity of 101 feet per second. If the ball started from a height of 10 feet off the ground, determine the time it will take for the ball to hit the ground.   It would take approximately 4.1 seconds to hit the ground. 


 * Phase 3**

Solving by graphing is useful because it makes it easier to solve for x in quadratic equations 



X intercept= -4 and 16

Solving by factoring: Solving by factoring is another way to solve for X.

Solving an equation by using the quadratic formula: Solving an equation by using the quadratic formula is done by using this formula -b +/- sqrt of b^2 -4ac divided by 2(a).

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Phase 4 **

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