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3 years ago

Florence has $400 in a savings account. The interest rate is 5% per year and is not

Mathematics

1 answer:

Sati [7]3 years ago

3 0

Answer:

$20

Step-by-step explanation:

I = 400(.05)(1)

I = 20

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Please help me I need help

dsp73

Answer:

i think it would be 87% i have been working on ths for a mnet and it got confusing for a sec i may be rong but i am pretty shure that this is the answer

btw i cant spell

Step-by-step explanation:

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3 years ago

What is the sum of the geometric series in which a1 = −5, r = 3, and an = −405?

marysya [2.9K]

An = a1 * r^(n-1)

-405 = -5*3^(n-1)

3^(n-1) = 81

3^4 = 81 so n-1 = 3 and n = 4

Sn = S4 = -5 (1 - 3^4) / ( 1 - 3) = 400 / -2 = -200 Answer

3 0

3 years ago

Find the sum of the first 6 terms of the sequence: –3, 1, 5, 9, . . .A) 45B) 42C) 48D) 25

Leni [432]

SOLUTION

From the sequence give

–3, 1, 5, 9, . . .

The first term, a = -3

The common difference, d = 4 (gotten by adding 4 to the next term).

The number of terms required n = 6.

Formula for sum of an arithmetic sequence is given by

$S_n=\frac{n}{2}\lbrack2a+(n-1)d\rbrack$

Substituting these values into the equation above we have

$\begin{gathered} S_n=\frac{n}{2}\lbrack2a+(n-1)d\rbrack \\ S_6=\frac{6}{2}\lbrack2\times-3+(6-1)4\rbrack \\ S_6=3\lbrack-6+(5)4\rbrack \\ S_6=3\lbrack-6+20\rbrack \\ S_6=3\lbrack14\rbrack \\ S_6=42 \end{gathered}$

Hence, the answer is 42, option B

3 0

1 year ago

What times 17 -20 equals 180?

grigory [225]

Answer:

Step-by-step explanation:

17-20=3. 60times3 equals 180. So 60

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3 years ago

8. Two alarms ring simultaneously

Anestetic [448]

3:20 then 3:40 then 4:00 for both

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3 years ago

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