Sn = n(n+1) = 100(101) = 10100
Answer:
P=12.56
Step-by-step explanation
Formula 1 : 

What I did there was I substituted or plugged in the given information and I combined them.

When you solve it, your answer should be: 
Hope this helps and answers your question. :D
Answer:
147.03 cm²
Step-by-step explanation:
Area of a parallelogram:
A = bh
A - area
b - base
h - height
From the figure,
Base = 16.9 cm
Height = 8.7 cm
A = (16.9)(8.7)
A = 147.03 cm²
Answer:
147 * 0.15 = 22.05
Step-by-step explanation:
To do other, divide the percentage by 10 then times that with the number you wish to change. Example:
30% of what percent is 130: 130 * 0.3 = 44.1
157% of what percent 956: 956 * 1.57 = 1500.92