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Vedmedyk [2.9K]
3 years ago
10

If $7,000 is placed in an account with an annual interest rate of 5.5%, how long will it take the amount to triple if the intere

st is compounded annually? Round your answer to two decimal places.
...?
Mathematics
1 answer:
butalik [34]3 years ago
4 0
A= P(1 + r/n) ^nt
21000=7000(1+0.055/2)^1t

t = 20.52 years

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Roger mixed 5/8 cup of red paint with 2/5 cup of yellow paint. How much red paint is needed (using the same ratio) if he wants t
never [62]
Set up the ratio as fractions

(5/8) cup red / (2/5) cup yellow = r amount of red / 1 cup yellow

Then cross multiply the numbers and set up as a equation like this

(5/8) × 1 = (2/5) × r

(5/8) = (2/5)r

Multiply both sides of the equation by (5/2) to get rid of the fraction and solve for r

(5/2) × (5/8) = (2/5)r × <span>(5/2)

25/16 = r

Reduce down to 5/4 or change to a mixed number

1 and 1/4  cups = r</span>
5 0
3 years ago
Please help UwU<br><br>also hope your day is going GREAT <br>if correct i will give BRAINIEST
Grace [21]
90 is the answer to your question!
3 0
3 years ago
The spending limit on John's credit card is given by the function f(t) = 15,000 + 1.57, where x is his monthly income. 1-13) $60
coldgirl [10]
1.
"The spending limit on John’s credit card is given by the function f(x)=15,000+1.5x"

means that if the monthly income of John is $ 5,000 ,he can spend at most

f(5,000)=15,000+1.5*5,000=15,000+ 7,500=22, 500 (dollars)

Or for example

if Johns monthly income is $8,000, then he can spend at most

f(8,000)=15,000+1.5*8,000=15,000+ 12,000=27,000 (dollars)


2.
Now, assume that the maximum amount that John can spend is y.

Then, y=15,000+1.5x

we can express x, the monthly income, in terms of y by isolating x:

y=15,000+1.5x

1.5x = y-15,000
X=y-15,000/1.5

thus, in functional notation, x, the monthly income, is a function , say g, of variable y, the max amount:
X=g(y) y-15000/1.5
since we generally use the letter x for the variable of a function, we write g again as:

G (x) x-15000/1.5
tells us that if the maximum amount that John can spend is 50,000 $, then his monthly income is 23,333 $.

3.

If John's limit is $60,000, his monthly income is
G(600,000)=60,000-15,000/ 1.5=45,000/1.5 =30,000

dollars.


Answer: $ 30,000

Remark: g is called the inverse function of f, since it undoes what f does.

instead of g(x), we could use the notation
5 0
3 years ago
If $5000 was invested at a rate of 5%, how many years would it take to triple if it is compounded daily
maw [93]

Answer:

If your money earns a 5 percent interest rate, it will triple in 23 years (115 divided by 5 equals 23).

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Problem Solving World
jonny [76]

Answer:

46

Step-by-step explanation:

To solve this, add.

28 + 18 = 46

7 0
3 years ago
Read 2 more answers
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