First we list the multiples of each number. multiples of 5 are 10,15,20,25,30,35,40,... multiples of 6 are 12,18,24,30,36,42,48,... multiples of 15 are 30,45,60,75,90,... now, when you look at the list of multiples, you can see that 30 is the smallest number that appears in each list. therefore, the least common multiple of...... 5,6 and 15 is 30.
Good idea to look up the formula for "surface area of a sphere" and to write it down for later reference. It is A=4 pi r^2, where r is the radius of the sphere. If the given sphere has a diameter of 7 cm, what is the radius of this sphere?
Write your answer inside the parentheses, below:
Sphere surface area = 4 pi (r)^2, or (in this case), A = 4(3.14)( )^2
