original quantity : 10 for $1
new quantity: 4 for $1
now we have to find each percent change
10-4=6
6÷100=0.06
0.06=6%
the quantity went down 6%
Answer:
2
Step-by-step explanation:
see the image for the explanation
346
(40*22)-(34*16)
=880-544
=346
D)54
Explanation:
hope this helps you...
60+30=90 degrees = complementary angles.