by a semi circle that has a diameter of 12 feet find the arc length of the semi circle to the nearest foot find the area of a semi circle to the nearest square foot

**Step-by-step explanation:**

Arc length formula is

[tex]s = rx[/tex]

where x is radinas.

A semi circle has a radian measure of

[tex]\pi[/tex]

The radius is half of the diameter, 12 so the radius is

[tex]12 \times \frac{1}{2} = 6[/tex]

So the arc length is

[tex]6 \times \pi = 6\pi[/tex]

Area of semi circle is

[tex] \frac{1}{2} \pi {r}^{2} [/tex]

where r is the radius.

[tex] \frac{1}{2} \pi6 {}^{2} [/tex]

[tex] \frac{1}{2} 36\pi[/tex]

[tex]18\pi[/tex]

Which is a composite number? A.97 B.89 C.95 D.13

PLEASE I REALLY NEED THE CORRECT ANSWER RIGHT NOW!!!!

**Answer: C. 95 is a composite number.**

**Step-by-step explanation:**

You can look at the ones place of each number to see if any end in 0, 2, 5, or any other digit that indicates that the number is not prime. Since 95 ends in a 5, it can be divided by 5, making it have more factors than 1 and itself. Therefore, 95 is the composite number of the list of numbers.

**Answer:95**

**Step-by-step explanation:composite numbers are numbers that have more factors than 1 and itself, factors are numbers you can multiply to get a number. 95 is a composite number since 1,95, AND 5 are all factors of 95 making it a composite number**

b. What is the area of the surface of Crater Lake?

Give a step by step explanation

**Answer: 23.76 miles**

**Step-by-step explanation:**

You are basically finding the perimeter for question a

given that perimeter is [tex]\pi[/tex]d

Subsitute the values

So perimeter = [tex]\pi[/tex] x 5.5 = 5.5 [tex]\pi[/tex] miles = 17.28 miles (2.d.p)

For question b, the area of the surface of Crater lake is finding its area

Given that area of a circle is [tex]\pi r^{2}[/tex]

Substitute the values

Because 5.5 is the diameter, to find the radius, divide by 2 to get 2.75

Area = 2.75^2 x [tex]\pi[/tex] = 7.5625[tex]\pi[/tex] = 23.76 miles^2 (2.d.p)

QUESTION 1

A conical cup is 4 cm across and 6 cm deep. Water leaks out of the bottom at the rate of 2 cm/sec. How fast (in cm/sec) is the water level dropping

when the height of the water is 3 cm?(Round your answer two (2) decimal places)

The **water level **will be **dropping **at the **rate **of [tex]0.64 cm/sec[/tex] when the **height **of the **water **reaches [tex]3cm[/tex]

We are give a cone with dimensions as seen in the diagram in the attached image.

The volume changes at the rate

[tex]\frac{dV}{dt}=-2cm^2/sec[/tex]

the negative sign is used because the **volume of water is reducing**.

what we need to know is the **rate the height is changing **when [tex]h=3cm[/tex]. That is, we need to evaluate

[tex]\frac{dh}{dt}|_{h=3cm}[/tex]

The relationship between the **volume **and the **height **is given by

[tex]V=\frac{1}{3}\pi r^2h[/tex]

but both [tex]h[/tex] and [tex]r[/tex] are changing when [tex]V[/tex] changes. So we need to eliminate [tex]r[/tex] somehow. From the diagram, we can use the similar triangle property to accomplish this

[tex]\frac{r}{2}=\frac{h}{6}\\\\\implies r=\frac{h}{3}[/tex]

substitute into the **volume **formula to eliminate [tex]r[/tex]

[tex]V=\frac{\pi h^3}{27}[/tex]

differentiate both sides with respect to **time**, [tex]t[/tex], since both the **volume **and **height **are** functions of time**. They will both be differentiated implicitly

[tex]\frac{dV}{dt}=\frac{\pi h^2}{9}\frac{dh}{dt}[/tex]

to find [tex]\frac{dh}{dt}|_{h=3cm}[/tex], substitute the values for [tex]\frac{dV}{dt}[/tex] and [tex]h[/tex]

[tex]-2=\frac{\pi 3^2}{9}\frac{dh}{dt}\\\\\frac{dh}{dt}=-\frac{2}{\pi}\\\\\approx -0.64 cm/sec[/tex]

So the rate at which the height is reducing when it reaches [tex]3cm[/tex] is [tex]0.64cm/sec[/tex]

Learn more about **related rate of change** here: https://brainly.com/question/15576763

Pre college need help this

Mark me as brainlist please

Figure F is a scaled copy of E.

What is length of each missing measurement.

**Answer:**

answer

**Step-by-step explanation:**

what are do u mean what is f and e explain properly and then people will tell u

Pls need help

Also making this 10 points so i have 169 points left B)

**Answer:**

Second and fourth

**Step-by-step explanation:**

A line is in point-slope form when you write down as [tex]y-y_0=m(x-x_0)[/tex] - do not be distracted by the signs, +1 and +5 can both be written as -(-1) or -(-5) rispectively.

Graph the equation of the line parallel to 2x−y=6 and passing

through (-3, 1). Show work.

Answer:

It's a graph, see the image.

Step-by-step explanation:

Use the equation to find the slope. Use the slope and the point to graph the line.

Which triangle has vertices (–3, –5), (7, 4), (0, 4)?

**Answer:**

see attached

**Step-by-step explanation:**

The one that matches the triangle shown in the attachment has the given vertices.

what is the value of x in m(x+n)=n

The **equation **m(x + n) = n si **solved **for **x **will be given as x = n / m (1 - m).

A **linear **system is one in which the **parameter **in the **equation **has a degree of **one**. It might have one, two, or even more variables.

The **equation **is given below.

m(x + n) = n

By **simplifying **for x, then we have

x + n = n / m

x = n / m - n

x = (n - mn) / m

x = n / m (1 - m)

More about the **linear system **link is given below.

https://brainly.com/question/20379472

#SPJ1

This question on your unit test is a fill in the blank. Be prepared to type your answer. The graph show how many minutes it takes Ziah to run a certain distance in the city. What is the meaning of the point (4, 6)?

The point (4,6) means it took Ziah **4 minutes to run 6 blocks**.

This is because any point is of the form (x,y) where in this case

x = number of minutes

y = number of blocks

Melanie was training for a race. The line plot below shows the number of miles Melanie ran last week.

2. How many times did Melanie run ½ a mile?

**Answer:**

5 miles

**Step-by-step explanation:**

add the points together.

it seems like each point is how many miles they ran each day.

1/4 + 2(1/2) + 3/4 + 3(1) = 5

I need some help please

The answer is A.

A negative x a negative equals a positive so the square root of a negative value cannot be a negative value.

3 movie tickets cost 36$. at this rate, the cost per ticket is $..

**Answer: The cost per ticket is $12.**

**Step-by-step explanation:**

if you help me with this i’ll mark you brainlest if you are the first to answer.

**Answer:**

m∠1 = 97

m∠2 = 83

m∠3 = 97

m∠4 = 83

**Answer:**

m∠1 = **97°**

m∠2 = **83°**

m∠3 = **97°**

m∠4 = **83°**

**Step-by-step explanation:**

180 - 97 = **83°**

180 - 83 = **97°**

What's The Interest Rate?

I = $200

P = $800

T = 24 months

I think it is $200 because there is a I next to it so Stands for Intreat rate

Mark’s birthday is 32 weeks away. How many days until his birthday?

There are 7 days in one week

So multiply 32 by 7

32*7 =224 days

So multiply 32 by 7

32*7 =224 days

Dr. M wanted to estimate the mean cholesterol level for men living in Hartford. He took a sampled of 20 men from Hartford and found that mean cholesterol level is 86 with a standard deviation of 12. He wants to construct a 99 % confidence interval for mean cholesterol level of men.

In this case, the level of significance a and the critical value?

**Answer:**

answer is in an image here

imageshare.best/image.php?id=JS9NDO

**Explanation:**

copy n paste in browser

not a bot btw

It takes 6 hours to clean and detail a luxury car. During the morning of

cleaning, the workers were able to clean for 4 hours. If the variable t stands

for the amount of time the workers have left to clean the windows after lunch,

which of the following units could apply to this variable?

The correct answer is hours

The correct answer is hours

A deposit of $1000 is made in an account that earns 8% interest compounded quarterly. The balance in the account after n quarters is given by the following sequence. Find the balance in the account after ten years.

a

=100.000)

n=1,2,3

The balance after ten years.

The **balance **after ten years is **$2,208.04.**

When an amount of money is **compounded quarterly, **it means that the amount **deposited **and the interest earns interest every **quarter. **The formula that can be used to determine the **balance **in 10 years is:

FV = P (1 + r)^nm

FV = Future value P = Present value = $1000 R = interest rate = 8%/4 = 2% m = number of compounding = 4 N = number of years = 10$1000 x (1.02)^40 = **$2,208.04**

To learn more about **future value, **please check: https://brainly.com/question/18760477

Can someone help me please

Answer: 56 times

Pls mark brainleist i really need it

Pls mark brainleist i really need it

2. If Jordan's section contains 35 rows, how many seats are in her section?

seat(s)

**Answer:**

5

**Step-by-step explanation:**

11. Select the proper order from least to greatest for 2/3, 7/6, 1/8, 9/10.

O A.1/8, 2/3, 9/10, 7/6

O B.2/3, 9/10, 7/6, 1/8

O C.7/6,9/10, 2/3, 1/8

O D. 1/8, 9/10, 7/6, 2/3

**Step-by-step explanation:**

Option A is the correct answer

**Answer:**

A is correct

**Step-by-step explanation:**

[tex]\frac{1}{8}[/tex] is 0.125

[tex]\frac{2}{3}[/tex] is 0.667

[tex]\frac{9}{10}[/tex] is 0.9

[tex]\frac{7}{6}[/tex] is 1.167

which from this you can see that A represents the order from smallest to largest

Can someone help please?

ANSWER: A. Associative property of multiplication

A group of students organized a car wash to raise money for a local charity. The students charged $9.99 for each car they watched.In 3.5 hours they washed 14 cars.at that rate how much money could they earn in 8 hours?

**Answer:**

First you would divide 12 cars by 3 hours to see how many cars get washed per hour

Then you know that 4 cars get washed in one hour so you multiply it by $5.00 because you want to see how much money they earn in one hour

After you know they earn $20.00 per hour you multiply that by 8 because you want to see how much money they earn in eight hours

So your final answer is $160 for washing cars in 8 hours

HELP ME ASAP

Name the property below

9(x-5) = 9x -45

A. distributive

B. commutative

**Answer:**

A. distributive

**Step-by-step explanation:**

You would multiply the 9 with the x to get 9x, and then you would multiply the 9 with the negative -5 to get 9x-45.

5) 13,971.3 ÷ 2.1= What's the answer

the answer for this question is 6,653

Help help help math math math

**Answer:**

x=12

**Step-by-step explanation:**

[tex](4x + 15) + (x + 5) = 180 \\ 5x + 20 = 180 \\ 5x = 60 \\ x = 12[/tex]

**Answer:**

12

**Step-by-step explanation:**

The diagonal of a side of rhombus are of equal length. Find the measures of angles of the rhombus.

Explanation:

Consider ABCD is a rhombus

We know that

All sides are equal in rhombus i.e,

⇛AB=BC=CD=DA

and AC and BD are digonals

Given that

Diagonal and the side of the rhombus are equal.

⇛AB = BC = CD = DA = AC

Diagonal AC divides the rhombus into two triangles .

They are ∆ BAC and ∆ DAC

In triangle BAC

BA=BC=AC,(Given)

⇛∠ BAC=∠ABC= ∠ACB =60°→→→Eqn(i)

Similarly in ∆DAC ,

DA=DC=AC

⇛∠DAC=∠ACD=∠ADC=60°→→→Eqn(ii)

From eqn(i) and eqn(ii)

∠A=∠BAC+∠DAC=60°+60°=120°

and

∠B= ∠ABC = 60°.

and

∠C=∠ACB+∠ACD=60°+60°=120°

and

∠D =∠ADC=60°

∴ ∠A = 120° , ∠B = 60° ,∠C = 120° **&**** **∠D = 60°

Answer:-The measures of the all angles in the rhombus are 120° , 60° ,120° and 60°.

**Note:** [Figure refers in the attached file.

Kevin will be taking six classes next semester (Algebra, World History, Psychology, Political Science, Chemistry, and Art Theory) and would like to know how many different ways he can order his class schedule given that his university offers six time slots for classes each day. Assuming there are no constraints and each class can be taken in any time slot, how many different ways can Kevin order his classes?

=========================================================

Explanation:

We have 6 slots to fill A,B,C,D,E,F

There are 6 choices for choice A, then 5 choices for slot B, 4 for C, and so on until we reach one choice for slot F. Count down by 1 each time a slot is filled.

Multiply out those values to get: 6*5*4*3*2*1 = **720**

For more information, check out the concept of factorials.

---------

Another approach is to use the nPr permutation formula which is

[tex]_nP_r = \frac{n!}{(n-r)!}[/tex]

where in this case n = 6 and r = 6.

When divide f(x)=ax³+bx²+cx+d by (x+3), the remainder is 4, then what is the remainder when divide 2f(x)-6 by (x+3)?

**Answer:**

**Step-by-step explanation:**

When divide f(x)=ax³+bx²+cx+d by (x+3), the remainder is 4:

f(x) = m*(x + 3) + 4, where m is the quotientThen 2f(x) - 6 is:

2[m(x + 3) + 4] - 6 = 2m(x + 3) + 8 - 6 = 2m(x + 3) + 2**As we see the remainder is 2**

the sun`s blank is the layer that emits visible light
Mike Jones bought a new split-level home for $150,000 with 20% down. He decided to use Victory Bank for his mortgage. They were offering for 25-year mortgages. Provide Mike with an amortization schedule for two periods. (Use Table 15.1(b)). (Do not round intermediate calculations. Round your answers to the nearest cent.) Payment number Portion to Balance of loan Interest Principal outstanding 1 2
In absolute value equations when it equals to a negative number in the beginning do I make it positive in the positive case?
In "Charles," Laurie's mother discovers at the PTA meeting that there is no Charles in the kindergarten class. This discovery is an example of which type of irony?verbaldramaticsituationalMULTIPLE CHOICE
Food that has been prepared or handled should never be placed on the salesfloor before it has been.
Lower chamber of Congress has how many members?
would the person interviewing be considered a primary or secondary source?
What can form along faults when pushed together or pulled apart?O MountainsO VolcanoesO Both
Need help solving homework
Pls help and show ur work ASAP Ill add extra points
Julio is putting a rectangular pool in his backyard. The length ofthe pool is 7 feet more than the width. The perimeter of the poolis 54 feet. What is the length of the pool?23.5471710
De los tres cuartos de los asientos que hay en un camin, quitamos la tercera parte y aun quedan 20. Cuntos asientos tiene el camin?AYUDAA
what is the chemical formula for Salt and hydrogen gas?
how important is the 3 candle of advent?
Explain the theme of FRIENDSHIP as it is carr-ied out in the novella. (Hint: Discuss Lennie and George and how their presence on the ranch changed the men) Of Mice and Men
How does farming creates job for people?
PLEASE HELP WITH THIS ONE QUESTION Which statement about oogenesis is correct?A) Diploid secondary oocytes undergo meiosis II to form a haploid ootid cell and a polar body.B) Haploid secondary oocytes undergo meiosis II to form a diploid ootid cell.C) Two diploid secondary oocytes undergo meiosis II to form four haploid ootid cells.D) Haploid secondary oocytes undergo meiosis I to form a haploid ootid cell and a polar body.
[tex] \frac{3}{9} = \frac{?}{3} [/tex]What's the missing number
Name two types of Crime Scene Sketches
What characterizes the sender-receiver model of communication? A-The person who says something repeats it multiple times.B-The person who hears something consciously thinks about it.C-Only one person talks at a time.D-The person who hears something repeats what they heard back to the speaker