I hope this helps you
5=7x+0.1+10x-0.2
17x=5.1
x=5.1/17
x=3/10
x=0.3
surface area = 4 x pi x r^2
diameter = 1 so radius = 1/2 = 0.5
4 x 3.14 x 0.5^2 = 3.14 meters^2
42% of the body voted = 11960
Total student body = 11960/42% = 28476.19 = 28476 students
M - 30 = 10
so the number has to be 10 more than 30.
30+ 10 = m
m = 40
You can park in the garage for 5 hours 30 minutes
<em><u>Solution:</u></em>
Given that, shopping mall parking garage charges $2 for the first half hour and $1.20 for each additional half hour (even if it is under 30 minutes)
Therefore,
Cost for first half an hour = $ 2
Cost for each additional half an hour = $ 1.20
Let "x" be the number of each additional half hour
Therefore, total cost to pay is given as:
Total cost = Cost for first half an hour + (Cost for each additional half an hour)(number of each additional half hour)
Total cost = 2 + 1.20x
<em><u>Given you have $ 8 in cash</u></em>

Total hours parked = first half an hour + 5
Thus you can park in the garage for 5 hours 30 minutes