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jasenka [17]
3 years ago
11

Tina wants to save money for school. Tina invests $1000 in an account that pays an interest rate of 8%. How many years will it t

ake for the account to reach $1300? Round your answer to the nearest hundredth.
Mathematics
1 answer:
GaryK [48]3 years ago
6 0
1300=1000(1+0.08)^n

1300=1000(1+0.08)^n  =   1.3=1.08^n    =    n=㏒(∨1.08)(1.3)
----------------
    1000

n=3.40905

It will take Tina about 3 1/2 years to reach her goal.
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7 0
3 years ago
HELP ASAP<br> Find the 15th term or the geometric sequence 7, -21, 63,
mihalych1998 [28]
<h3><u>Answer:</u></h3>

33480783

<h2><u>Step-by-step explanation:</u></h2>

<u>Finding the Common Ratio:</u>

We know that the formula for the common ratio of a GP is:

r = aₙ / (aₙ₋₁)        <em>(Where n is any integer)</em>

<em>replacing the values, taking n=2</em>

r = -21 / 7

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<u>Solving for the 15th Term:</u>

We know that the Formula for the nth term of a GP:

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<em>replacing the values (taking n = 15 since we need the 15th term)</em>

G(15) = 7 * (-3)¹⁴

G(15) = 33480783

Hence, the 15th term of the given GP is 33480783

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