Mathematics High School

Please Help

Find the area of a circle with radius,
r
= 87cm.
Give your answer rounded to 3 SF.

Answers

Answer 1
Area = pie*r^2
Area= 23778.71
Answer 2

Step-by-step explanation:

so, to repeat, the radius r of the circle is 87 cm.

the area of a circle is

pi×r²

so, in our case

A = pi×87² = pi×7569 = 23,778.7148... cm²

so, how to give this answer with only 3 significant figures ?

as you can see, there are already 5 figures before the decimal point.

3 attempts :

1. 3 significant figures after the decimal point : 23778.715 cm²

2. scientific notation with 3 SF : 2.38×10⁴ cm²

3. converting to m² (1m² = 10000cm²) : 2.38 m²

Related Questions

Round 6 734 591 to 2 significant figures

Answers

6 700 000 is the answer because 2 significant figures just means the first two numbers and then the rest 0

Which statement is true about the slope of the line and what it means in this
situation?
The slope of the line is 1. This means that Jan runs 1 lap every minute.
The slope of the line is 2. This means that Jan runs 2 laps every minute.
I
The slope of the line is 2. This means that Jan runs 1 lap every 2 minutes.
The slope of the line is 4. This means that Jan runs 4 laps every minute.

Answers

Answer:

B. The slope of the line is 2. This means that Jan runs 2 laps every minute.

Step-by-step explanation:

This is a proportional relationship as the line passes through the origin.

Therefore you can use one point to determine the slope, (2, 4):

m = y/x = 4/2 = 2

The slope is 2. It is a 2 laps per minute.

Correct answer choice is B

(0,0)(2,4)

Slope

m=4-0/2-0m=4/2 m=2

Rate is 2 laps every minute

B

PLEASE SOMEONE HELP ASAP I NEED HELP WITH THIS

Answers

Answer:

See image

Step-by-step explanation:

Rate of change means how much does the number of snowflakes go up each time (on a different question you might find the number goes down each time)

"Initial value" means whatthe number if snowflakes at step zero. We have to work backwards to find that number. For the equation, fill in the rate in front of the x (we use m for that number) and add in the initial value (b) in the format y=mx+b . The information for the table is in the picture (the step numbers and number of snowflakes)

See image

the area of a triangle with vertices at (-3,-2),(3,-2),(1,2) is

please provide small explanation

Answers

Answer:

12

Step-by-step explanation:

First, you have to graph (which I sadly cannot provide an image of)

Then look at the vertical height which is 4, the how long it is which is 6.

So A=1/2*6*4=12

What is the slope of a line that passes through (2, 4) and (3, 8)

Answers

4 is the correct answer because it just is i dont need to prove myself to you

Can you please help me?!

Answers

Answer:

a. (2,1)

b. (0,2)

c. (4,0)

Step-by-step explanation:

2x+ 4y = 8 /2

x + 2y = 4

x = 4 - 2y and y = (4 - x)/2

a. x = 2 => y = 1

b. x = 0 => y = 2

c. y = 0 => x = 4

Calculate the measure of the major arc MPN.

Answers

Answer:

  310°

Step-by-step explanation:

The sum of arcs around a circle is 360°.

  MPN +MN = 360°

  MPN = 360° -MN . . . . . . . . subtract MN

  MPN = 360° -50° = 310° . . . fill in the given value

The measure of major arc MPN is 310°.

In the first week of​ July, a record people went to the local swimming pool. In the second​ week, fewer people went to the pool than in the first week. In the third​ week, more people went to the pool than in the second week. In the fourth​ week, fewer people went to the pool than in the third week. What is the percent decrease in the number of people who went to the pool over these four​ weeks?

Answers

Answer:

10%

Step-by-step explanation:

A swimming pool is 20 feet wide and 40 feet long. If it is surrounded by a walkway of square tiles, each is 1 foot by 1 foot, how much area do the pool and walkway cover?

Answers

Answer:

124 tiles

Step-by-step explanation:

2(20+40)

2(60)

120+4=124

Answer it please ❤❤❤❤❤❤❤❤❤❤ I really appreciate if u answer it ! ​

Answers

Answer:  

Josh has 60% of $600 that is $360

Daniel has $320

So Josh has more by $40

5)

Bianca has 43 votes

Carlos has 38% of the 150 vote that is 57

So Carlos has 14 more votes than Bianca

Step-by-step explanation:

You have learned that to find 1% of a number means finding 1/100 of it. Similarly, finding 60% of a number means finding 60/100 (or 6/10) of it. 60% of $600 → 60% × $600. 60% of $600 → 0.6 × $600.

Help me with the whole thing pls

Answers

Answer:

B and 90%

Step-by-step explanation:

4500 = m•5000

m = 0.9 × 100%

90% of the books are fiction


Look at picture this is so hard pls help

Answers

Answer:

The answer is B

Step-by-step explanation:

Rewrite the fraction 2/7 as a division expression with the same numbers.

Answers

Answer:

EZ. Btw you kinda already did it. 2/7 is a division problem. Another way is 2 divided by 7

Step-by-step explanation:

Determine the sign of the leading coefficient

Answers

Answer:

negative

Step-by-step explanation:

The graph falls to both the left and right, so the leading coefficient has to be negative, and it must be raised to an even power.

Sally earns commission for selling cars at the Nissan dealership. She earns 5.5% on
every car she sells. Last month, she sold 7 cars for a total of $160,000. What was
Sally's commission last month?

Answers

Answer:

8800

Step-by-step explanation:

BRAINLIEST
Please answer these

Answers

3.14 is used for pi.

6.  r = [tex]\sqrt{\frac{A}{\pi } }[/tex]

14.00

7. d = [tex]\frac{c}{\pi }[/tex]

5.00

8. d = [tex]2 \sqrt{\frac{A}{\pi } }[/tex]

23.01

9. r = [tex]\frac{c}{2\pi }[/tex]

20.01

10. d[tex]\pi[/tex] = [tex]2 \sqrt{{A}[/tex]

31[tex]\pi[/tex]

11. r[tex]\pi[/tex] = [tex]\frac{c}{2}[/tex]

22.5[tex]\pi[/tex]

Hope this helps :)

Answer:

12. 95.03

13. 52π mm or 52 mm

14. 119.38 meters

15. 227 in²

Note: (make sure to double check all of these because it never hurts to).

1. (2x^3)^4

2. 18 x^0

3. 7p ^-4

Answers

Step-by-step explanation:

1. 16x ^ 12 ( to raise a product to a power , raise its factor to the power , evaluate the power, simplify the expressions by multiplying exponents)

2. 1 ( its a rule any non zero expression raised to power of 0 equals to 1)

3. 7/p^4

Geometry - Isosceles & Equilateral triangles

Solve for x *

Answers

Answer:

7

Step-by-step explanation:

all sides in equilateral triangle are equal so side to the bottom is 56ft

base sides same in isosceles triangle so 56 = 8x

8x=56

56/8 is 7

On a map, two cities are 5 3/4 inches apart. the scale of the map is 1/2 inch equals 3 miles. what is the actual distance between the towns?

Answers

Answer:

18

Step-by-step explanation:

5.5 x 3=16.5

Add 1.5 and you get 18

Write a simplified polynomial expression in standard form to represent the area of the rectangle below.
X - 4
5X + 2

Answers

Step-by-step explanation:

i think is this the answer

5×-4=-20

-20+2=18

I need some help with this question, can anyone help me?

Answers

Answer: IM only in midle school i think this is it 7(3e + 5)

Step-by-step explanation: f it is brainliest whe someone answers pls ps you next question ready

At your school, the building is 20 feet tall, a tree's height is 252 inches, and the flagpole is 6 yards high.

Which of the three objects casts the longest shadow?

Answers

Answer: The Tree height is 21 feet.

Step-by-step explanation:

Let's convert the measurements to feet:

The Building is 20 feet.

The Tree height is 21 feet.

The Flagpole is 18 feet.

Therefore, the Tree is going to cast the longest shadow since it is the highest.

Question 3 Multiple Choice Worth 4 points) (03 02) A fish is 5 feet below the surface of a lake if its position can be recorded as -5 feet what would the position of o representa o the distance above the surface of the lake O the distance below the surface of the lake O the surface of the lake me height of the fish​

Answers

Answer:

omg u a real one been lloking for this bing bong

Step-by-step explanation:

the length of a rectangle is five times it’s width. if the perimeter of the rectangle is 72 yd find its area

Answers

Answer:

Try sketching an image of the rectangle. Area = length x width. To find the perimeter you would add up the length of all four sides.

Step-by-step explanation:

Quick easy question

Answers

Answer:16

Step-by-step explanation:

144^0.5 = 12

400^0.5 = 20

a^2=b^2+c^2

20^2 = 12^2 +x^2

x^2 = 400-144= 256

x =16

Answer:

16

Step-by-step explanation:

The latest mystery novel cost $24 the table shows the sales of that this novel by a bookstore what was the dollar amount of the sales of the mystery novel on Saturday right in equation tomorrow to work

Day. Books sold

Thursday. 93

Friday. 103

Saturday 157

Sunday. 116

Answers

Answer:

  $3768

Step-by-step explanation:

The amount of sales will be the product of the selling price of each book and the number of books sold.

  sales = book price × number of books

  sales = $24 × 157 . . . . . . . . books sold on Saturday

  sales = $3768 . . . . . . . . . . . sales on Saturday

What is the answer for the explanation

Answers

Answer: You cannot figure out the value without any measurements or tools for that matter.

Step-by-step explanation:

Im blue ba da de ba da da

is the equation in the picture true or false?

Answers

Answer:

false

Step-by-step explanation:

I hope this helps!!

Help guys plzzz asapppp

Answers


sin(x) = opp/hyp
cos(x) = adj/hyp
tan(x) = opp/adj

sin(x) = 3.9/8.1
sin(x) = 0.481

Inverse sin of 0.481 = 28.8 degrees

Each answer should be between 0 and 90 :)

How much do you need to invest to earn 2000 dollars in interest at a rate of 7% over 15 years?

Answers

Answer:

i dont know

Step-by-step explanation:

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