Answer:
90
Step-by-step explanation:
-Find the prime factorization of 9
9 = 3 × 3
-Find the prime factorization of 10
10 = 2 × 5
-Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 2 × 3 × 3 × 5
LCM = 90
