It equals 0.3 times 60 = 18 minutes. How many minutes are three tenths of an hour? Three tenths of an hour is equal to 0.3 hours., What is the smallest composite number that is divisible by 3 5 and 9? 45. Look at the prime decompositions of all three numbers: 3 = 3 5 = 5 9 = 3 * 3 Then take the "union" of all these , A prime number has exactly two factors, 1 and the number itself. 393 has 4 factors, 1, 3, 131, and 393, so 393 is a composite. Trending Questions What are the basic features of telecommunication , This is a Prime Cost as referred to in the Bill of Quantities 2) Prime cost in regards to a contract is the sum of all the major works which the Main Contractor must produce under the contract., 997 is the biggest 3 digit Prime number. What is the biggest decimal number? What IS the biggest decimal number?That isn't answering the question. Trending Questions ., The prime numbers between the prime number 101 and the composite number 110 are 103, 107, and 109. How many palindromes are between 0 and 1000? 109. What is the actual orbit size of Saturn?.