Answer:
$56.77 each week
Step-by-step explanation:
He pays for 30% of 9867 per year.
9867*0.3=2960.1
Divide the answer by number of weeks in a year.
= $56.7689
Round.
Answer:

Step-by-step explanation:
As the numbers are only between 1 and 30
Total number of possible combinations = 30×30×30 = 27000
If there are 100 attempts then

∴ Probability someone can guess the correct combination given 100 attempts is 
please edit your question man
2+5-71
7-71
-64
answer is -64
A ratio is like a fraction, so since you are provided with the numbers its easy to put it into a ratio
depth is 3.8km
width is 7600km
ratio is 3.8:7600