2. the slope is 2 because

he then turns around and grabs that money and sticks it for another 9 years,

add both amounts, and that's how much is for the whole 21 years.
Answer: 12.6986263 ounces
Step-by-step explanation:
Step-by-step explanation:
20:100=x:$38.55
x=20×$38.55/100=7,71
Answer:
time period (t) is 2.25 years
Step-by-step explanation:
Given data in question
amount (a) = $94000
principal (p) = $78870
rate (r) = 7.8 % = 0.078
to find out
time period (t)
solution
we know that continuous compound interest formula i.e.
amount = principal
...............1
we will put all value a, p and r in equation 1
amount = principal 
94000 = 78870 
= 94000 / 78870
now we take ln both side
ln
ln (94000 / 78870)
0.078 t = ln 1.19183466
0.078 t = 0.175494
t = 0.175494 /0.078
t = 2.249923
so time period (t) is 2.25 years