0.9% / 100% = 0.009
= 9/1000
equivalent ratio:
9/1000 = 153/x
cross multiply
9x = 153,000
x = 153,000/9
x = 17,000
153/17,000 = 0.009
10) 23710, 23715, 23751
11) 5206, 52701, 54025
12) 456231, 456321, 465321
13) 329854, 330820, 303962
14) dec, oct, nov
15) colorado, arizona, new mexico
Answer:
pythagoras theorem
so we have a and b
12 and 9
so ...
take the square root to find c, since 225 is c^2
so √225 = c = 15