Answer:
3%
Step-by-step explanation:
Erin earned 6191.50 -6100 = 91.50 in interest in 6 months on a 6100 principal. Then the annual interest rate is ...
I = Prt
r = I/(Pt) = 91.50/(6100·6/12) = .03 = 3%
The interest rate was 3%.
Answer:
C.
is the right answer
Step-by-step explanation:
Answer:
Area of the circle is 9.42?
Step-by-step explanation:
3 times 3.14
Answer:
Her initial position was:
-29ft
Where we use the minus sign because this is below the ocean's surface.
Now we also know that she keeps descending at a rate of -29ft per minute, then if she keeps descending for t minutes, her position will be:
P(x) = -29ft - 29ft/min*t
Now, we also know that she does not want to descend more than 81ft below the ocean's surface, then we have the inequality:
P(x) ≥ -81ft
-29ft - 29ft/min*t ≥ -81ft
Now let's isolate t in one side:
- 29ft/min*t ≥ -81ft + 29ft = -52 ft
- 29ft/min*t ≥-52 ft
t ≤ -52ft/(- 29ft/min) = 1.79 min
Then the maximum amount of time that she can keep descending is 1.79 minutes.
Recall that
which means
Now, 
could be positive or negative, which means 
. If we specifically knew the sign of was positive, then we can simplify and write
or if it's negative,
