Ok I gotta I’ll help you right now
The formula for the period T of a pendulum is T = 2π Square root of√L/g, where L is the length of the pendulum and g is the acceleration due to gravity.
13.
(a)

for x = 2:

for x = 5

(b)
The graph is:
(c)
Using the graph:



Using the quadratic formula:
Answer:
you would save .66 per pack so .66×3=1.98
Step-by-step explanation:
9.99÷3=3.33, 3.99-3.33=.66