5× 10 to the power of 22 is how many times greater than 1 × 10 to the power of 21

50 times greater

Step-by-step explanation:

If there are two numbers A and B, where A is greater than B,

If we want to find how many times greater A is to B, we simply divide, so that would be

A/B

Now, we have

and

We simply need to divide to find how much greater is the first number than the second number. Remember dividing numbers in scientific notation:

Thus, we have:

So the first number is 50 times greater than the second

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

x=half

step-by-step explanation: