Answer:
The total amount accrued, principal plus interest, from compound interest on an original principal of $ 2600 at a rate of 7% per year compounded 1 time per year over 13 years is $ 6266.
Step-by-step explanation:
Given
Principle P = $2600
Interest rate r = 7% = 0.07
Time period t = 13 years
Compounded annually means: n = 1
To determine
Accrued Amount = ?
Using the formula

substituting P = 2600, r = 0.07, t = 13, n = 1


$
Therefore, the total amount accrued, principal plus interest, from compound interest on an original principal of $ 2600 at a rate of 7% per year compounded 1 time per year over 13 years is $ 6266.
P- Parenthesis
E- Exponents
M- Multiplication
D- Division
A- Addition
S - Subtraction
Answer:
So I would say any one of the following:
(1-.2)p
p-.2p
.8p
Step-by-step explanation:
If you start with price p and you are getting it marked down 20%, then you are paying (100-20)%p.
So you have:
(1-.2)p
or if you use distributive property:
1(p)-.2(p)
p-.2p
or if you combine the like terms:
.8p
Call the number of blue jays

and the number of robins

We are told there are twice as may robins as blue jays:

and, there are 21 birds in total:

thus, by substitution:

combine like terms:

solve for

:

back substitute:

There are 7 blue jays and 14 robins.