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3 years ago

The formula for the volume of a sphere is V=4/3 3.14r^3. What is the formula solved for r?

Mathematics

1 answer:

suter [353]3 years ago

5 0

$V = \frac{4\pi r^{3} }{3} \\ \\ \\ \frac{3V}{4 \pi } = r^{3} \\ \\ \sqrt[3]{ \frac{3V}{4 \pi } } = r$

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A 15 pound bag of ice costs $ 1.80. Give the unit rate.

Vaselesa [24]

We can use a rule of three simple, direct proportion to solve this problem.
15 pounds correspond to $1.80, then the question is to find the price of one pound, the called unit rate. We state the rule of three:
15 pound ----> $1.80
1 pound -----> x
x = (1)(1.80)/15
x = 0.12
Therefore, each pound costs $0.12 that is the unit rate in pounds

7 0

3 years ago

Do alto de um farol cuja altura é de 20 m avista se um navio sob ângulo de depressão de 30°. A que distância , aproximadamente,

Mkey [24]

Esta é a trigonometria . Se você desenhar uma linha a partir do topo da casa de luz para o barco, você terá a hypotonuse de um triângulo. Um truque é lembrar que este é um triângulo especial. É um triângulo 30-60-90 , que tem propriedades especiais mostradas na fixação abaixo . por isso sabemos que o lado adjacente que não é o hyposonuse é x√3 . Agora sabemos que x√3 = 20
Solve for x.
x√3=20
divide both sides by √3.
x=20/(√3)
Try not to have square roots (√) in denomenator so multiply top and bottom by √3 and get
x=(20√3)/3
x is what we are looking for so the answer is 
20√3 m ou cerca de 34.64 m

7 0

4 years ago

What Are the values of x and y?

dem82 [27]

Answer:

y = 72.5

x = 35.

Step-by-step explanation:

First Off, Let's Divide the question.

Let's Find the variable y : 

there are 2 y(s), so it is 2y.

equation: 2y +35 =180.

I put 180 because A straight Line is always 180.

2y+35=180

1. Subtract both sides.

2y = 145

y = 72.5

Next,Find x 

So y + y + x = 180.

We already know y, which is 72.5

72.5 +72.5 + x = 180

72.5 +72.5

x + 145 = 180

x = 35.

Hope This Helps!

8 0

3 years ago

For which equations below is x = –3 a possible solution? Check all that apply.

Fiesta28 [93]

|x|=3, |-x|=3, -|x|=-3. You can check each of the options one by one. First notice that the absolute value of some number can never be negative, so eliminate b, d and f. |-3|=3. |-(-3)|=|3|=3. -|3|=-3. So these three solutions are all correct answers.

6 0

3 years ago

Which graph has a rate of change of zero

Hatshy [7]

Answer:

When the graph has a horizontal line.

Step-by-step explanation:

Zero rate of change. When the value of increases, the value of remains constant. That is, there is no change in value and the graph is a horizontal line.

SOURCE: GOOGLE

5 0

3 years ago

Read 2 more answers