Answer: 1.8 s
Step-by-step explanation:
Given
The height of the spring mass system above the table is given by

The mass is performing S.H.M with frequency 
and 

time when mass returns to its original position

Answer:
C
Step-by-step explanation:
30x20=600
In order to find the average you have to add up all the data values and then find the sum of the data values.

So on average he ran about 82.5 miles.
100 cm = 1 meter
<span>4.5 meter x 100 cm = 450 cm </span>
<span>450 cm / 4.5 cm = number of pieces of ribbon </span>
<span>450/4.5 = 100</span>
$35.00 x .20 = $7
So the discount would be $7 off of $35, for a final sale price of $28