You drop a snowball from the top of a building, 111 feet above the ground. The expression to represent the height of the snowball is −16t2+111
-
16
t
2
+
111
,

where t is the number of seconds after the snowball is dropped.

The equation 0=−16t2+111
0
=
-
16
t
2
+
111
represents when the snowball hit the ground.

Find the value of t, rounded to the nearest tenth.

[how many seconds it took for the snowball to hit the ground].

Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit