Question

suppose you drop a tennis ball from a height of 9 feet. after the ball hits the floor, it rebounds 80% of its previous height.
a. 5.8 ft
b. 1 ft
c. 4.6ft
d. 7.2ft

is the sequence arithmetic? if so, identify the common difference.
17,22,33,46,...

a. yes;5
b.no
c. yes;-5
d. yes;11

what is the 12th term of the sequence 20, 16, 12,...
a.-30
b.-20
c.-28
d.-24

find the missing term of the arithmetic sequence 20,___,32,..
a.42
b.18
c.34
d.26

is this sequence geometric?
1/3, 2/9, 4/27, 8/81, 16/243

a.yes;2/3
b.yes;1/9
c. yes;1/6
d. not geometric

Answer 1

I will give a medal to who ever can answer all of these

Answer 2

for the top one use http://www.onlineconversion.com/percentcalc.htm

Answer 3

arithmetic sequences are increasing by a constant value

Answer 4

and geometric sequences are the products of the value previous multiplied by x (some value)

Answer 5

1) 7.2
2)no
3)-24
4)26
5)yes 2/3