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umka2103 [35]
3 years ago
10

HELP

Mathematics
1 answer:
andrew11 [14]3 years ago
5 0

Answer:

aₙ = -2ⁿ⁻¹

Step-by-step explanation:

Your geometric series  is

-1,-2,-4, …

The first term (a₁) is -1, and each successive term is twice the one before it (the common ratio, r)

The formula for the nth term of a geometric series is

aₙ = a₁rⁿ⁻¹

The general formula for your series is then

aₙ = -2ⁿ⁻¹

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telo118 [61]

Answer:

Option 2: 14.06 minutes

Step-by-step explanation:

For the first scenario, we will convert the minutes into hours first to get all the quantities in same unit

So,

15 minutes = 1/4 hours = 0.25 hours

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Now using the speed, distance and time formula

Speed = distance/time

Speed = \frac{distance}{time}

7.5 = \frac{distance}{0.25}

7.5 * 0.25 = Distance

Distance = 1.875 miles

So the distance for 1st day is 1.875 miles.

For next day

Speed = 8 miles per hour

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So,

speed = \frac{distance}{time}

8 = \frac{1.875}{time}

time = \frac{1.875}{8}

time = 0.234375 hours

Converting the hours into minutes will give

0.234375 * 60 min =  14.0625 minutes

Rounding off to two decimals = 14.06 min

So 2nd option is correct..

6 0
4 years ago
Write a problem that involves changing kilograms to grams. explain how to find the solution.
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4 years ago
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Step-by-step explanation:

4 0
3 years ago
Someone help me with the answer please
elena-14-01-66 [18.8K]
Given,
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3pen and 2 pencil cost 114
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3 years ago
Read 2 more answers
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Dmitry_Shevchenko [17]

19.6 and 0.486

hope this helps

8 0
3 years ago
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