Answer:
t represents the time in minutes since the balloon started descending.
a(t) represents the altitude of the balloon at t minutes.
a(5.5) gives the altitude at 5.5 minutes.
Answer:

Step-by-step explanation:
1. Make fraction to decimal

2. Order from least to greatest.
1.7 > -2 > -2.5
Least to greatest : 
Answer:
You can break 24 things
Step-by-step explanation:
One minute is 60 seconds, so all you have to do is double how many things you can break in 30 seconds
Answer:
$6.60
Step-by-step explanation:
6.20 x 3 = 18.60
6.90 x 4 = 27.60
18.60 + 27.60 = 46.20
46.20 ÷ 7 = 6.60
F(n)=f(n+1)=f(n+1)-5 because in the formula you are subtractinng