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Mekhanik [1.2K]

3 years ago

14

WILL MARK BRAINLIEST HELP QUICK Find the sum of the digits of the number 6+66+666+6666 + ... +666...66, where the last number co

ntains 100 digits. (sum of digits after adding them, not just sum of numbers)

1 answer:

zheka24 [161]3 years ago

8 0

Answer:

8,136

Step-by-step explanation:

Add all of the numbers together

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Oblicz.Pamiętaj o kolejności wykonywania działań

SashulF [63]

Answer:

33.275

Step-by-step explanation:

<u>1 step:</u> Difference in brackets

$3.5-2\dfrac{1}{3}=3\dfrac{1}{2}-2\dfrac{1}{3}=(3-2)+\left(\dfrac{1}{2}-\dfrac{1}{3}\right)=1+\dfrac{3-2}{3\cdot 2}=1+\dfrac{1}{6}=1\dfrac{1}{6}$

<u>2 step:</u> $0.75\div\dfrac{1}{3}$

$0.75\div\dfrac{1}{3}=\dfrac{75}{100}\div \dfrac{1}{3}=\dfrac{3}{4}\times \dfrac{3}{1}=\dfrac{9}{4}$

<u>3 step:</u> $1.28\div 0.04$

$1.28\div 0.04=128\div 4=32 \ \text{Move point two decimal places}$

<u>4 step:</u>

$2\dfrac{1}{4}\times 1\dfrac{1}{6}=\dfrac{2\cdot 4+1}{4}\times \dfrac{1\cdot 6+1}{6}=\dfrac{9}{4}\times \dfrac{7}{6}=\dfrac{63}{24}=\dfrac{21}{8}$

<u>5 step:</u>

$\dfrac{9}{4}+32-\dfrac{21}{8}+1.65=(32+1.65)+\left(\dfrac{9}{4}-\dfrac{21}{8}\right)=33.65+\dfrac{9\cdot 2-21}{8}=33.65-\dfrac{3}{8}=33.65-0.375=33.275$

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3 years ago

Use polar coordinates to find the limit. [if (r, θ) are polar coordinates of the point (x, y) with r ≥ 0, note that r → 0 as (x,

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3 years ago

A man walked 6 km per hour how far does he work between 9:30 a.m. and 12 p.m.

kolbaska11 [484]

Answer:

15 km

Step-by-step explanation:

9:30 to 12:00 = 2.5 hours

2.5 x 6 = 15

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3 years ago

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Step-by-step explanation:

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3 years ago

The length of the shadow on flat ground of a man who is 6 feet tall and is standing up straight is 8 feet. The distance between

WARRIOR [948]

The answer is 10 ft. make a triangle 6ft tall, 8ft long (90 degrees to the other line) and draw a line to complete the triangle. This is a type of 3,4,5 triangle, a 6,8,10. The other way to do it is sqrt(6^2+8^2) = sqrt(36+64) = sqrt (100) = 10.

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3 years ago