How long will it take the golf ball to hit the ground?

39 secs

19 secs

12 secs

6 secs

2.Ken is building a table. He attached planks of wood and now wants to build a border around the planks. The area of the entire table should be no larger than 3,276 square inches. All together, the planks are 36 inches wide and 72 inches long. Which quadratic equation represents the area of the planks and border combined? (The border must have equal width on each side.)

4x2 + 216x + 2,592 = 0

4x2 + 216x − 684 = 0

2x2 + 216x − 3,276 = 0

x2 + 108x + 3,276 = 0

## Answers (1)

d = ut + (1/2)at^2

a = -32 (due to gravity)

d = 0

u = 192

0 = 192t + (1/2)(-32)t^2

0 = 192t - 16t^2

t(192 - 16t) = 0

t = 0 or 192 - 16t = 0

t = 0 or 16t = 192

t = 0 or t = 192/16

t = 0 or t = 12

Answer: 12 seconds

2.

If the thickness of the border is x:

(36 + 2x)(72 + 2x) = 3276

2592 + 72x + 144x + 4x^2 - 3276 = 0

4x^2 + 216x - 684 = 0