To estimate, you would usually round to a significant figure
so, 20* 70=1400
The actual answer is 1521, so we know we are close
Answer:

Step-by-step explanation:
Given


Required
Determine the probability of selecting You, Anna and Kevin
Assuming the selection process is fair;
Each employee has a probability of;

So:



Answer:
A
Step-by-step explanation:
you do a/18=4/a, cross multiply
a^2=72
a=6 square root of 2
Answer: 21
Step-by-step explanation: 21 divided by 7 is three to the third power of 11 so your answer is 21, I think