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Marina86 [1]
3 years ago
15

4. Stacey currently has an account balance of $1,007.78. Her Initial deposit on the account was $616 and it earned 5.3% simple i

nterest. How long has Stacey held the account? (2 points)
7 years
31 years
12 years
19 years
Mathematics
1 answer:
Serjik [45]3 years ago
7 0

Answer:

12 Years

Step-by-step explanation:

Simple interest is calculated as I = Prt, where P is the principal (amount of money invested), r = rate of interest written as decimal, and t = time

The amount started as P and incresed by Prt, so

P + Prt = 1007.78

616 + (616)(0.053)t = 1007.78

Now you need to solve for t:

Subtract 616 from both sides and simplify:

32.648t = 391.78

Divide both sides by 32.648:

t = 12

Answer: 12 years

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Simplify -3i sqrt -40<br><br> Enter your answer in simplest radical form
Mariulka [41]

Answer:

Step-by-step explanation:

-3i  √(-40) = -3i √40i²    ...(i² = - 1)

                 = -3i √40 i

              -3i  √(-40)  =   3√40

6 0
3 years ago
work out the circumference of this circle take pie to be 3.142and give your number to 1 decimal place and the radius is 11.2cm
harina [27]
Circumference is 2*pi*r
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6 0
3 years ago
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How would I solve this problem-6.3n=-8.19
Gre4nikov [31]
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5 0
3 years ago
A student repeatedly measures the mass of an object using a mechanical balance and gets the following values: 560 g, 562 g, 556
MrRissso [65]

Answer: 2.76 g

Step-by-step explanation:

The formula to find the standard deviation:-

\sigma=\sqrt{\dfrac{\sum(x_i-\overline{x})^2}{n}}

The given data values : 560 g, 562 g, 556 g, 558 g, 560 g, 556 g, 559 g, 561 g, 565 g, 563 g.

Then,  \overline{x}=\dfrac{\sum_{i=1}^{10} x_i}{n}\\\\\Rightarrow\ \overline{x}=\dfrac{560+562+556+558+560+556+559+561+565+563}{10}\\\\\Rightarrow\ \overline{x}=\dfrac{5600}{10}=560

Now, \sum_{i=1}^{10}(x_i-\overline{x})^2=0^2+2^2+(-4)^2+(-2)^2+0^2+(-4)^2+(-1)^2+1^2+5^2+3^2\\\\\Rightarrow\ \sum_{i=1}^{10}(x_i-\overline{x})^2=76

Then, \sigma=\sqrt{\dfrac{76}{10}}=\sqrt{7.6}=2.76

Hence, the  standard deviation of his measurements = 2.76 g

6 0
3 years ago
What is 96 divided by 7,488 <br><br> PLEASE HELP MARK AS BRAINLIEST
erica [24]

Answer:

78

Step-by-step explanation:

Normal division

7488\96=78


5 0
3 years ago
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