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Masteriza [31]
2 years ago
12

Which expression is equivalent to

Mathematics
1 answer:
lisabon 2012 [21]2 years ago
8 0

Answer:

i think the answer is, A...

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Brooklyn has a goal to save $8,000 to buy a new entertainment system. In order to meet that goal, she deposited $4,132.79 into a
densk [106]
To see how much interest she'll get after a quarter:

$4132.79 + ($4132.79 × 0.048) = $4331.16

After two quarters:
$4331.16 + ($4331.16 × 0.048) = $4359.06

You can keep going until eventually reaching $8000 then see how many quarters has passed. That's a lot of calculator work!

There's another way that uses less calculation, but more algebra. I call it the exponential formula method! There's this general formula for stuff that increases exponentially, like virus, population, and MONEY:

m= d {e}^{tc}

M is money, d is deposit, t is time taken, and c is just some unknown constant related to the interest rate. There's also the natural logarithm form of this equation, which will come in handy later:

ln( \frac{m}{d} ) = tc

Alright first we gotta find that constant c for this equation to be useful! Let's plug in stuff we know.

ln( \frac{4331.16}{4132.79} ) = (0.25)c

We know how much she'll have after one quarter (0.25 years), and we know how much she deposited initially.

After pressing some buttons on the calculator we'll find that c = 0.1875.

Great! Now we can use that formula to find how many years (t) it'll take to reach M=$8000. To save time I'm going to use the natural log form:

ln( \frac{8000}{4132.79} ) = t(0.1875)

That will give us t = 3.522 which means it'll take approximately 3.5 years for her deposit to reach $8000!
5 0
3 years ago
Read 2 more answers
Suzannes school are painting a rectangular mural outside the buillding that will be 15 feet by 45 feet the students are also goi
tatuchka [14]

Answer:

THE LENGTH OF THE STUDENTS PAINTING=15/3=5

THE BREADTH OF THE STUDENTS PAINTING=45/3=15

AREA OF THEIR PAINTING=15×5=75

4 0
3 years ago
The value of 3 in 6300 is how many times the value of 3 in 530
deff fn [24]
The value of the 3 in 6300 os 300 and it is ten times as many as the 3 in 530
8 0
3 years ago
Read 2 more answers
221,000,000,000,000,000,000 in scientific notation
larisa [96]
2.21 x 10^17 and the answer is 2.21e+17
8 0
2 years ago
Solve the inequality
stepladder [879]

Answer:

(2.5+3)

Step-by-step explanation:

im not 100% sure though sorry

3 0
2 years ago
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