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uranmaximum [27]
3 years ago
10

Sally invests £8000 in a savings account. The account pays 2.8% compound interest per year work out the value of her investment

after 4 years give your answer to the nearest penny
Mathematics
1 answer:
Alborosie3 years ago
6 0

Answer: the value of her investment after 4 years is £8934.3

Step-by-step explanation:

The formula for determining compound interest is expressed as

A = P(1+r/n)^nt

Where

A = total amount in the account at the end of t years

r represents the interest rate.

n represents the periodic interval at which it was compounded.

P represents the principal or initial amount invested.

t represents the duration of the investment in years.

From the information given,

P = 8000

r = 2.8% = 2.8/100 = 0.028

n = 1 because it was compounded once in a year.

t = 4 years

Therefore,

A = 8000(1+0.028/1)^1 × 4

A = 8000(1+0.028)^4

A = 8000(1.028)^4

A = £8934.3 to the the nearest penny

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Answer:

The correct option is:

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Step-by-step explanation:

The students has made a mistake in the 3rd step.

We know that when we multiply or divide any negative number on both sides of the inequality, the sign of inequality  reverse its direction.

In step 3 the student divided 25 by -5 but did not  switch direction of the inequality sign.

Therefore the correct option is: The student should have switched the direction of the inequality sign to get –5> x for a final answer

5 0
3 years ago
Let g(x) = 2x2 - 11x. Find g(-1).<br> A) -13 Eliminate <br> B) -9 <br> C) 0 <br> D) 13
worty [1.4K]

Solution

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Plugging in x = -1 in g(x), we get

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Now we have to simplify it.

g(-1) = 2*1 + 11

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So the answer is D) 13.


Thank you. :)

3 0
3 years ago
A taxi driver had 29 fares to and from the airport last Monday. The price for a ride to the airport is $4.50, and the price for
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Step-by-step explanation:

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What is the sum of the rational expressions below? x+3/x-2 + 3x-8/x-2
Mamont248 [21]

Answer:      \bold{\dfrac{4x-5}{x-2}}

<u>Step-by-step explanation:</u>

Since the expressions have the same denominator, we simply need to add the numerators.

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