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3 years ago

Keep gettin those wrong. Please help!!!

Mathematics

1 answer:

larisa [96]3 years ago

5 0

Answer: About 14.14 in^3

Step-by-step explanation:

We know that the circumference of a sphere is C=2πr. We are given that the circumference is 9.42 in. We can find the radius to get our volume.

$9.42=2\pi r$

$4.71=\pi r$

$r=1.5\\$

Now that we know radius, we can find our volume.

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

$V=\frac{4}{3} \pi (1.5)^3$

$V=14.14in^3$

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Harriet lives on the ground level of her apartment building. The level she lives on is repersented as by?

sattari [20]

Answer:

zero

Explanation:

In any system:

the ground (base) is referred to as zero lever

what comes above the ground level would be positive

what comes below the ground level would be negative

Now, we are given that:

she lives on the ground floor.

Based on the above, the representation would simply be zero

Hope this helps :)

4 0

4 years ago

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Which number is irrational? -4 2/9 8.26 11

kipiarov [429]

Answer:

None of them are irrational.

Step-by-step explanation:

An Irrational Number is a real number that cannot be written as a simple fraction.

Therefore:

-4 can be written as -4/1

2/9 is already in fraction

8.26 can be written as 826/100

11 can be written as 11/1

None of them are irrational.

However numbers like $\sqrt{x}, \pi$ are irrational as they can not be represented as fractions.

3 0

3 years ago

What is the average rate of change of h over the interval (2,6) ? Give an exact number.

Viktor [21]

Answer:

Step-by-step explanation:

3 0

3 years ago

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You are designing a rectangular garden. the garden will be enclosed by fencing on three sides and by a house on the fourth side.

RUDIKE [14]

Suppose the dimensions of the rectangle is x by y and let the side enclosed by a house be one of the sides measuring x, then the sides that is to be enclosed are two sides measuring y and one side measuring x.

Thus, the length of fencing needed is given by

P = x + 2y

The area of the rectangle is given by xy,

i.e.

$xy = 288 \\ \\ \\ \\ \Rightarrow y= \frac{288}{x}$

Substituting for y into the equation for the length of fencing needed, we have

$P=x+2\left( \frac{288}{x} \right)=x+ \frac{576}{x}$

For the amount of fencing to be minimum, then

$\frac{dP}{dx} =0 \\ \\ \Rightarrow1- \frac{576}{x^2} =0 \\ \\ \Rightarrow \frac{576}{x^2} =1 \\ \\ \Rightarrow x^2=576 \\ \\ \Rightarrow x=\sqrt{576}=24$

Now, recall that

$y= \frac{288}{x} = \frac{288}{24} =12$

Thus, the length of fencing needed is given by

P = x + 2y = 24 + 2(12) = 24 + 24 = 48.

Therefore, 48 feets of fencing is needed to enclose the garden.

8 0

3 years ago

Richard work 20 hours this week he also got a Bonus of $25 if he made at least $185 how much does he get paid per hour

OlgaM077 [116]

Answer:

It’s the third choice : x ≥8

Step-by-step explanation:

the third choice means he made equal to or greater than $8 an hour.

185-25=160

160÷20=8

7 0

3 years ago