A number is at least four (translating inequalities)

Step-by-step explanation:

Given

A number is at least 4

Required

Write as inequality

Let the number be n

So, we have:

n is at least 4

In inequalities, at least means

So, the expression becomes

the least common denominator is 40

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons