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3 years ago

Help me someone please my teacher needs this soon or I’m going to fail school

Mathematics

2 answers:

Naddik [55]3 years ago

4 0

Answer:

A. 9π/3 · 2

Step-by-step explanation:

Use the equation of circumference and substitute the value of radius:

C = 2πr

C = 2π*3 = 6π inches

Compare the answer choices to find the correct one, which is:

9π/3 · 2 = 3π · 2 = 6π

Gnesinka [82]3 years ago

4 0

Radius=3in

$\\ \sf\longmapsto Circumference=2\pi r$

$\\ \sf\longmapsto Circumference=2(3)(π)=6\pi$

Now

Check 1st option

$\\ \sf\longmapsto \dfrac{9\pi}{3}.2=6\pi$

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Can someone help me with this :(

julia-pushkina [17]

Answer:

Step-by-step explanation:

6+x, when x = 3

6+(3)

6+3=9

5 0

3 years ago

Read 2 more answers

The table shows the predicted growth of particular bacterium after various numbers of hours. Write an explicit formula for the s

Oksana_A [137]

Answer:

-29

Step-by-step explanation:

Problem 1

In the first hour, the number of bacteria is 22

In the second hour,the number of bacteria is 44

It looks like the formula is some multiple of 22

That means you should pick D

Problem 2

n = 12

a = 15

d = - 4

an= 15 + (n - 1)*d

a12 = 15 + 11*(-4)

a12 = 15 - 44

a12 = - 29

6 0

3 years ago

Aria paid $75,000 for her house. Its property value increased by 2.2% per year. When Aria sold her house after eleven years, how

astra-53 [7]

Answer:

When Aria sold her house after eleven years it worth was $95,300.

Step-by-step explanation:

Given:

Aria paid $75,000 for her house. Its property value increased by 2.2% per year.

Now, to find the worth of Aria house when sold after eleven years.

Let the amount of house after eleven years be $x.$

Amount Aria paid for her house (A) = $75,000.

Rate of property increased per year (r) = 2.2%.

Time (t) = 11 years.

Now, to get the amount of house after eleven years we put formula:

$x=A\times (1+\frac{r}{100})^{11}$

$x=75000\times (1+\frac{2.2}{100})^{11}$

$x=75000\times (1+0.022)^{11}$

$x=75000\times (1.022)^{11}$

$x=75000\times 1.2704$

$x=95280.$

The amount of house after eleven years to the nearest hundred dollars is $95,300.

Therefore, when Aria sold her house after eleven years it worth was $95,300.

3 0

3 years ago

A population has a standard deviation of 7.89. what is the approximate standard error of the mean for a sample size of 300?

scoundrel [369]

Answer:

Below.

Step-by-step explanation:

Standard error =

standard deviation / √n

= 7.89 / √300

= 0.456 approx.

6 0

2 years ago

Point s is on the line segment rt . Given RT= x+5 st = 4x-9 and rs = x-2 determine the numerical length of rt

Anna11 [10]

Answer:9

Step-by-step explanation:RS+ ST+RT

X-2+4x-9=x+5

4x-11=5

4x=16

X=4

7 0

3 years ago