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2 years ago

Don’t the permeter of the figure (HELPP PLEASEEE)

Mathematics

1 answer:

posledela2 years ago

8 0

Answer:

Step-by-step explanation:

the formular for calculating the perimeter of a semi circle is πr

from the figure, r= 12/2= 6

perimeter= 3.142×6 = 18.852

perimeter = 19 approximately

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Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. What is the

motikmotik

Answer:

45.44/71 - 1 = -0.36 = -36%

36% decrease.

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3 years ago

The product of 25 and an unknown number is subtracted from 36. The result is -114.

svetlana [45]

Let x = the unknown number to get x = 6

3 0

3 years ago

A series of three? separate, adjacent tunnels is constructed through a mountain. Its length is approximately 25 kilometers. Each

Nadya [2.5K]

Answer:

$312.5\pi \text{ km}^3\approx 981.75\text{ km}^3$

Step-by-step explanation:

We have been given that a series of 3 separate, adjacent tunnels is constructed through a mountain. Its length is approximately 25 kilometers.

Each of the three tunnels is shaped like a half-cylinder with a radius of 5 meters.

Since we know that volume of a semicircular or a half cylinder is half the volume of a circular cylinder.

$\text{Volume of a semicircular cylinder}=\frac{\pi r^2h}{2}$ , where,

r = Radius of cylinder,

h = height of the cylinder.

Upon substituting our given values in volume formula we will get,

$\text{Volume of a semicircular cylinder}=\frac{\pi (5\text{ km})^2*25\text{ km}}{2}$

$\text{Volume of a semicircular cylinder}=\frac{\pi*25\text{ km}^2*25\text{ km}}{2}$

$\text{Volume of a semicircular cylinder}=\frac{\pi*625\text{ km}^3}{2}$

$\text{Volume of a semicircular cylinder}=\pi*312.5\text{ km}^3$

$\text{Volume of a semicircular cylinder}=981.74770\text{ km}^3$

Therefore, the volume of earth removed to build the three tunnels is $312.5\pi \text{ km}^3\approx 981.75\text{ km}^3$ .

4 0

3 years ago

3. Tmobile charges 100 dollars for the initial phone line and then 20 dollars for every phone line afterwards.

salantis [7]

A)your equation for t-mobile would be
y=20x+100

Topar equation
y=30x

B) you’d set the two equation equal to each other

20x+100=30x

giving you the answer x=10

C) when x>13

D) when x<14

i’m a bit iffy on the last two but that’s the conclusion i came to

5 0

3 years ago

Michael is paid $9 per hour to work at the movie theater and $7 per hour when he helps his aunt at her bakery. Michael cannot wo

evablogger [386]

if he works at the theater he can make $288 in 32 hours, if he works at his aunts he can make $224 in 32 hours. he should work at the theater to meet his goal.

I really hope this helps

4 0

2 years ago

Read 2 more answers