Answer:
0.31 yr
Step-by-step explanation:
The formula for interest compounded continuously is

FV = future value, and
PV = present value
If FV is twice the PV, we can calculate the doubling time, t

1. Brianna's doubling time

2. Adam's doubling time
The formula for interest compounded periodically is

where
n = the number of payments per year
If FV is twice the PV, we can calculate the doubling time.

3. Brianna's doubling time vs Adam's
10.663 - 10.355 = 0.31 yr
It would take 0.31 yr longer for Brianna's money to double than Adam's.
Answer:
-16
Step-by-step explanation:
10 Divided by 5=2
-16 + 2 = -14
Answer:
The unit rate is 4.5 days per trip
Step-by-step explanation:
So the equation would be 90 divided by 20
Simplified it is the same thing as 9 divided by 2
90 divided by 20 is 4.5
Jocab will take 4 more weeks to buy that MP3 player.
<u>Step-by-step explanation:</u>
Given:
Cost of MP3 player = $ 195
Earning per week = $ 225
Expenses per week = $ 180
To Find:
Weeks still required to save money for buying MP3 player.
Formula to be used:
Savings per week = Earning - Expenses
Solution:
Savings per week = Earning - Expenses
= $ 225 - $ 180 = $ 45
Already saved = $ 55
Need to save = $ 195 - $ 55 = $ 140
So for 4 weeks savings = $ 45 × 4 = $ 180
Thus Jocab will take 4 more weeks to buy that MP3 player.
Answer:
Estimation is important because It is used to determine how reasonable a quotient is, as well as making sure its within reasonable range.