It is a 5% discount 400 x .05 = 20
400 - 20 = 380
Answer:
6%
Step-by-step explanation:
principal =6000$
time=9years
simple interest=3,240$
now,
Rate=SI ×100/P×T
=3240×100/6000×9
=324000/54000
=6%
Answer: 
<u>Step-by-step explanation:</u>

The answer is 118 cm³
The volume of tetrahedron (V), where a is its altitude, can be expressed as:


≈ 118 cm³
1265/34=37.2
Since the number of shelves needs to be integer number, so he needs 38 shelves.