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2 years ago

Find the area of the semicircle.

Mathematics

1 answer:

weqwewe [10]2 years ago

3 0

Step-by-step explanation:

Given

diameter (d) = 6

radius(r) = d/2 = 6/2 = 3

Now

Area of semi circle

$\frac{\pi {r}^{2} }{2}$

$= \frac{3.14 \times {3}^{2} }{2}$

$= 14.13 \: square \: units$

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A pencil decreases in size by 1/12 millimeters per day. The total change in size of the pencil is -7/9 millimeters. How many day

AlekseyPX

9 1/3 days

Step-by-step explanation:

If the total change in the size of the pencil is -7/9 millimeters. Then the actual change itself is 7/9 which is a positive value.

If each day the pencil changes by 1/12 millimeters, how many 1/12 millimeters are there in 7/9 millimeters. This is a division query;

7/9 ÷ 1/12 = 7/9 * 12/1 = 28/3

= 9 & 1/3 days

Learn More:

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brainly.com/question/1878884

brainly.com/question/78672

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2 years ago

A piece of nickel has a mass of 3.48kg and a volume of 400cm3.

lisov135 [29]

Answer:

density = 0.0087 kg/cm³

Step-by-step explanation:

density = mass/volume

= 3.48/400 = 0.0087 kg/cm³

4 0

2 years ago

2 is 4% of what number

Black_prince [1.1K]

6 is the answer...............................

6 0

2 years ago

Read 2 more answers

What the answer to this equation X/8+4=5 ?

V125BC [204]

Answer:

The answer to this equation is 8

Step-by-step explanation:

$\frac{x}{8} +4=5\\$

First: Subtract

$8-4=4$

$5 > 4$ meaning that 5 is greater than 4.

You still need another number to make it equal than or greater than or equal to five.

$5-4=1$

Since 5 minus 4 does equal 1

You need somewhere to divide it from to get 1 so you can add up the 4 to it and get the answer to the equation.

Lastly: Divide

$\frac{8}{8} =1$

$1+4=5\\5=5\\4\neq 5$

Now, if you do 8/8 which equals 1, 1+4 = 5; Now everything is, equaled up!

So in conclusion...

$\frac{x}{8} +4=5\\x=8\\\frac{8}{8}=1\\1+4=5\\5\neq5$

3 0

2 years ago

Read 2 more answers

i have 30 coins, all nickels, dimes and quarters, worth $4.60. there are two more dimes than quarters.. how many of each kind of

Oliga [24]

Answer:

Step-by-step explanation:

I have 30 coins, all nickels, dimes, and quarters, worth $4.60. There are two more dimes than quarters. How many of each kind of coin do I have.

let quarters be x

dimes = x+2

...

dimes + quarters = x+x+2=2x+2

...

nickels = 30-(2x+2)

...

5(30-(2x+2))+10(x+2)+25x=460

5(30-2x-2)+10x+20+25x=460

150-10x-10+10x+20+25x=460

160+25x=460

-160

25x=460-160

25x=300

/25

x=300/25

x=12 ---- quarters

x+2= 12+2=14 dimes

30-(2x+2)=4 nickels

...

check

4*5+14*10+12*25=20+140+300=460

4 0

1 year ago