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garik1379 [7]
3 years ago
7

Melanie invested $3,800 in an account paying an interest rate of 2 % compounded

Mathematics
1 answer:
GaryK [48]3 years ago
4 0

Answer:

.85

Step-by-step explanation:

Compound interest formula

PV(1+\frac{i}{n})^{nt}

Melanie:

3800(1+\frac{.02}{4})^{(6*4)\\}\\=3800(1+.005)^{24}\\3800*1.1272=4283.21

Sebastian:

3800(1+\frac{.02}{12})^{12*6}\\3800(1.0017)^{72}\\3800*1.1274=4284.06

4824.06-4283.21= .85

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a display at an aquarium has sea stars to wolf eels in a ratio 4 : 5. It also has 5/8 as many rockfish as sea stars. there are 4
r-ruslan [8.4K]

The number of sea stars is 64.

What is a ratio?

Comparing two amounts of the same units and determining the ratio tells us how much of one quantity is in the other.

In general, a: b, which can be interpreted as "a is to b," is used to denote a ratio between two quantities, let's say "a" and "b."

This ratio is expressed in fraction form as a/b. We utilize the same method for further simplifying a ratio as we use for further simplifying a fraction.

According to the question,

Ratio of sea stars to wolf eels = 4:5

Number of rock fish= 5/8 (Number of sea stars)

Number of wolf eels - Number of rock fish = 40

Using the given information, we get,

Number of sea stars = 8/5 (Number of rock fish)

On simplification,

Number of wolf eels = 80

So, number of sea stars = (4/5)*80

                                          = 64

Learn more about ratios here:

brainly.com/question/2328454

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7 0
2 years ago
Solve for x <br> 4 (x – 7) = -8
daser333 [38]
It should be 5. When you distribute the 4, it turns into 4x then (4•-7) = -28. Add 28 to -8 and you get 20. Divide 4 on Both sides and X=5
6 0
4 years ago
Read 2 more answers
Are x and y inversely proportional in the table below?
rosijanka [135]
Answer: yes they are

Example: if you don’t believe me check for yourself :)
6 0
3 years ago
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A certain number of friends are waiting in line to board a new roller coaster. they can board the ride in 5,040 different ways.
Paraphin [41]

There are seven (7) friends.

The first friend to board can be any one of the 7.  For each of them ...
The 2nd one to board can be any one of the remaining 6.  For each of them ...
The 3rd one to board can be any one of the remaining 5.  For each of them ...
The 4th one to board can be any one of the remaining 4.  For each of them ...
The 5th one to board can be any one of the remaining 3.  For each of them ...
The 6th one to board can be either of the remaining 2.  For each of them ...
The 7th one to board is the last 1 standing.


The number of different ways that this could play out is

              (7 x 6 x 5 x 4 x 3 x 2 x 1)  =  <em>5,040</em>


6 0
3 years ago
Can someone tell me why this isn’t a function? I thought it was because each input has an output.
aksik [14]

Answer: I think it's because you can't have two of the same numbers in the domain. For example the (5, -3) and the (5,2)

Step-by-step explanation:

6 0
3 years ago
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