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3 years ago

Plz explain and help me

Mathematics

2 answers:

mart [117]3 years ago

5 0

Finding volume well just multiply base x height
Hope that helps ;)

horsena [70]3 years ago

3 0

Volume=length x width x height

3 x 2=6 6 x 5=30

a is 30

b is 2 x 3 x 1 or 6 x 1

V=b x h or L x w x h

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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:

After 47 days she will have more than 90 trillion pennies.

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

A rectangular city park measures 7/10 mile by 2/7 mile. What is the area of the park?

schepotkina [342]

A = L x W
A = 7/10 *2/7 = (7*2) / (10*7) = 2/10 = 1/5

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4 years ago

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What does this symbol mean "⊥" ?

givi [52]

Answer:

The symbol ⊥ means is perpendicular to

Step-by-step explanation:

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3 years ago

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If you know this answer can you help lol

AnnyKZ [126]

The answer is C whole

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Cos θ = -3/5; θ is in QIII. What is sin θ? 4/5 -5/3 -4/5 5/3

Tatiana [17]

Hello :
Cos θ = -3/5
sinθ = - 4/5
because : Cos² θ +sin²θ = (-3/5)²+(-4/5)2 =9/25+16/25 = 25/25 = 1
and θ is in QIII.where : sinθ < 0

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3 years ago