CHAPTER 5 DISCUSSION LAB

Problem 1

Betsy is asked by her instructor to subtract the quantity ( + 5 9) from the quantity (2 3 2) and believes that the correct answer is 3 + 8 11. Is she correct? If not, then what is wrong with her answer?

Problem 2

Carefully study each equation below. Do any of them have errors? For the equations that have errors, provide an explanation of the mistake made. If you think that an equation is correct, then simply write, .

a) ² + 25 = ( + 5)( + 5)

b) ³ 27 = ( 3)³

c) ² 2 + 24 = ( 6)( + 4)

d) 10³ + 15² + 5 = 5(2² + 3)

e) ⁴ + 10² + 21 = (² + 3)(² + 7)

Problem 3

A baseball is thrown upward from the top of a 448-ft-tall building with an initial velocity of 48 feet per second. The height, , of the baseball above the ground seconds after being thrown is given by the function () = 16² + 48 + 448.

a) Find the height of the baseball 2 seconds after being thrown.

b) Find the height of the baseball 4 seconds after being thrown.

c) Find the time it takes for the baseball to strike the ground