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3 years ago

What is the circumference of a circle that has a radius of 7 m?

Mathematics

1 answer:

Helen [10]3 years ago

5 0

Step-by-step explanation:

you you can use two formulas here either pi d or 2 pi r so when you use pie d which change the radius to diameter by multiplying by two so in this case we will multiply 7 by 2 to get 14 then use the formula so is 22/7 * 14 to get 44

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Find all real numbers s such that -2(s - 7) > 4s + 8. Give your answer as an interval.

Sedaia [141]

-2s + 14 > 4s + 8
6 > 6s
s < 1
So it's {-<span>∞, . . . . ., -2, -1, 0}

Hope this helps.</span>

8 0

3 years ago

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1.A cube has side lengths of 15 inches, what is the surface area and volume of the cube? 2. A cube has side lengths of 8 inches,

omeli [17]

Answer:

Cube 1: 3375 cubed inches, 1350 inches squared.

Cube 2: 512 cubed inches, 384 inches squared.

Step-by-step explanation:

Formula for Volume of a Cube: $V=s^3\\$ (s - side length)

Formula for Surface Area of a Cube: $SA=6s^2$ (s- side length)

The side length's 15 inches.

Find the volume:

$V=15^3\\\rightarrow 15*15*15=3375\\\boxed {V=3375}$

The volume of cube one is 3375in³.

Find the surface area:

$SA=6(15)^2\\\rightarrow 15^2 = 225\\SA = 6 * 225\\\boxed {SA=1350}$

The surface area of cube 1 is 1350in².

The side length's 8 inches.

Find the volume:

$V=8^3\\\rightarrow 8*8*8= 512\\\boxed {V=512}$

The volume of cube two is 512in³.

Find the surface area:

$SA=6(8)^2\\\rightarrow 8^2=64\\SA=6*64\\\boxed {SA=384}$

The surface area of cube 2 is 384in².

<em>Brainilest Appreciated. </em>

3 0

3 years ago

Mr. Vella can build a brick wall in 4 days. His apprentice can build the same wall in 6 days. After working alone for 3 days, Mr

Vitek1552 [10]

Mr. Vella can build the wall in 4 days, however only works on it for 3 days. That means that he has completed 75% of the and is leaving 25% for his apprentice.

We need to figure out how long it takes the apprentice to build 25% of a wall. We know he can build 100% of a wall in 6 days, so dividing 6 days by 4 will give us our answer.

6/4 = 3/2 = 1.5 days

It took the apprentice 1.5 days to finish the wall.

6 0

3 years ago

An employee at a gym wants to select a random sample of gym members for a survey about their exercise habits.

34kurt

Answer:

No, no, yes, no

Step-by-step explanation:

The first one is not random. He is sampling only the earliest gym goers.

The second one is not random. He is sampling only from one zip code.

The third one is random. He is using a random number generator.

The fourth one is not random. He is sampling only volunteers.

5 0

3 years ago

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PLS PLS PLS HELP!!!! THIS IS DUE TODAYYYYY!!!!!! NO LINKS, NO STEALING POINTS, AND ONLY CORRECT ANSWERS OR YOU WILL BE REPORTED!

lianna [129]

Answer:

The person that answered at the top is a legend!! The picture below is just proof that he/she is right!! :)

Step-by-step explanation:

9514 1404 393

see attached Starting with the original function, swap the variables x and y, then solve for y. The resulting function is the inverse of the original function.

i hope this help's pleazz dont report me okay

8 0

2 years ago

Read 2 more answers