Answer:
1st = 4×10 ^-9
2nd= 4×10^1
3rd = 4×10^7
4th = 4×10^-5
Step-by-step explanation:
for whole numbers you just have to count from the ending till the number indicated beside the x10
for decimals you count from the front starting at the decimal till you cover the whole number
 
        
             
        
        
        
Answer:
2 inches is the height of the box.
Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:
We can apply Pythagoras' Theorem.

 
        
             
        
        
        
I'm not sure what you mean, but if you mean 15 and 1/20th, you just multiply 15 by 20 and add one which is 301 and keep the denominator