Answer:

Step-by-step explanation:
Given

Required
Determine an equivalent expression
Express 81 as 

Apply law of indices






Hence:

Answer:
2 1/5, 1/10, - 2 3/4, -4
Step-by-step explanation:
If you're ever confused about whether a number is greater than another number, think about them on a number line. If the number is further to the left than another number, it is less (for example, 0 is further to the left than 2).
Answer:
a 90° rotation
I'm not sure about answer...
Answer:
2.5678 to the nearest half is 13,000
Answer:
+x
Step-by-step explanation: