It should be 12×18. 1:3 means you take where it's at, at 1 and multiply it's size by 3.
        
                    
             
        
        
        
You get 92.56 <span>You add the area of the rectangle to the area of a circle
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When you are multiplying an exponent directly into a number/variable with an exponent, you multiply the exponents together.
For example:


When you are multiplying a variable with an exponent by another variable with an exponent, you add the exponents together.
For example:



You multiply 3 into each exponent in the numerator and the denominator

When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive.

When you have something like this:

You subtract the exponents together, so:

Your answer is the second option
 
        
             
        
        
        
Answer: 45
Step-by-step explanation:

 
        
             
        
        
        
Answer:
30 blocks
Step-by-step explanation:
60 minutes = 1 hour
For one hour, she will walk 7.5 blocks. 
The rate is 7.5blocks per hour.
Multiply this by 4 hours, and you will get 30 blocks.
(7.5)4 = 30