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Ad libitum [116K]
4 years ago
9

Danny invests $10,000 in a savings account that pays 3.5% simple interest. If Danny does not make any additional deposits or wit

hdrawals, how much will be in the account after 7 years?
Mathematics
2 answers:
netineya [11]4 years ago
6 0

Answer: $12,450

Step-by-step explanation:

Hi, to answer this question we have to apply the simple interest formula:  

I = p x r x t

Where:  

I = interest

P = Principal Amount  

r = Interest Rate (decimal form)  

Replacing with the values given  

I = 10,000 x (3.5/100) x 7

I = 2,450

Adding the interest to the amount invested.

10,000 + 2,450 = $12,450

Feel free to ask for more if needed or if you did not understand something.

olga_2 [115]4 years ago
4 0

Answer:

The amount in the account after 7 years is $12,450

Step-by-step explanation:

To calculate the amount that will be in the account after 7 years, what we do is to simply add the interest to the principal.

Thus, we need to calculate the interest. Mathematically, the simple interest can be calculated using the formula below;

I = PRT/100

where P is the principal which is the amount deposited initially into the account = $10,000

R is the interest rate which is 3.5%

T is time which is 7 years

Plugging these figures, we have

I = (10,000 * 3.5 * 7)/100

I = $2,450

Thus the amount we have in the account which is interest + capital = 2,450 + 10,000 = $12,450

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C(x) = 400 + 20x - 0.2x²

c(30) = 400 + 20(30) - 0.2(30)²

= 400 + 600 - 0.2(900)
= 1000 - 180
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Marginal cost is how much it would cost to make one MORE of the same product so now we find how much it costs to produce 31 radios and compare the two. 

c(31) = 400 + 20(31) - 0.2(31)²

= 400 + 620 - 0.2(961)
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= 827.8 or ≈828.

Now we find the difference which means we subtract the two. 

828 - 820 = 8. 

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To compare we can also do 29 radios. 

c(29) = 400 + 20(29) - 0.2(29)² = 811.8 or ≈812

820 - 812 = 8. 
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3 years ago
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4 years ago
Show how u got the answer 309×42
luda_lava [24]
                3            
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the answer would be 16380
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