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uranmaximum [27]
4 years ago
11

MATH PROBLEM NEED ANSWER ASAP!!!

Mathematics
1 answer:
vitfil [10]4 years ago
3 0
2 feet of the board remain
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A leprechaun places a magic penny under a girls pillow. The next night there are 2 magic pennies under her pillow. The following
kiruha [24]

Answer:

<em>After </em><em>47</em><em> days she will have more than 90 trillion pennies.</em>

Step-by-step explanation:

At the beginning there was 1 penny. At the second day the amount of pennies under the pillow became 2.

The amount of pennies doubled each day. So the series is,

1,2,4,8,16,32,.....

This series is in geometric progression.

As the pennies from each of the previous days are not being stored away until more pennies magically appear so the sum of series will be,

S_n=\dfrac{a(r^n-1)}{r-1}

where,

a = initial term = 1,

r = common ratio = 2,

As we have find the number of days that would elapse before she has a total of more than 90 trillion, so

\Rightarrow 90\times 10^{12}\le \dfrac{1(2^n-1)}{2-1}

\Rightarrow 90\times 10^{12}\le \dfrac{2^n-1}{1}

\Rightarrow 90\times 10^{12}\le 2^n-1

\Rightarrow 2^n\ge 90\times 10^{12}+1

\Rightarrow \log 2^n\ge \log (90\times 10^{12}+1)

\Rightarrow n\times \log 2\ge \log (90\times 10^{12}+1)

\Rightarrow n \ge \dfrac{\log (90\times 10^{12}+1)}{\log 2}

\Rightarrow n \ge 46.4

\Rightarrow n\approx 47


8 0
3 years ago
MAKE A RAP ABOUT SCHOOL <br><br> GIVING BRAINLIEST AND 100 POINTS &lt;3
Licemer1 [7]
Ayo,I gotta explain u complain a lot these days u make me feel tired even math u can’t solve ur own problems teachers u know everything but when I ask u a questioning become my student ur boring- I tried hhh
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2 years ago
7500millimeter=________meter
kykrilka [37]

Answer:

7.5 meters

Step-by-step explanation:

7500÷1000=7.5

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4 0
3 years ago
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Find the scale factor
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Answer:

C. 50

Step-by-step explanation:

The triangles are proportional and that is why you can find the scale factor. Set up a proportion (equivalent fractions). Set the proportion up with the corresponding sides together on thee top or the bottom of the proportion.

<u>65  </u> = <u>  91</u>

x         70

91x = 65 * 70

<u>91x</u> = <u>4550</u>

91        91

x     =  50

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3 years ago
Use absolute value to express the distance between −13 and 17 on the number line.
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I cant draw to show it on the number line
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