Mathematics College

10. A road roller takes 750 revolutions to move once to
level a playground. Find the area of the ground if the
diameter of the road roller is 168 cm and length is 2.8
m.​

Answers

Answer 1

Answer:

Step-by-step explanation:

Use consistent units. The length of the roller is 2.8 m. The diameter is 168 cm = 1.68 m

Circumference of roller = 1.68π m

Contact area of roller = 1.68π × 2.8 = 4.704π m²

Each rotation levels 4.704π m² of the playground.

Area of playground = 750 rotations × (4.704π m²)/rotation

= 3528π m²

≈ 11,084 m²

Related Questions

Which expression is equivalent to ?

Answers

Answer :
84x-16y-10.6

Solution :
2(14x-3y+28x+12.2-5y-17.5)
= 28x-6y-56y+24.4-10y-35
= 84x-16y-10.6

Find the area of the square in inches 2 and enter your answer below. Do not include units in your answer.

Answers

Answer:

4 in²

Step-by-step explanation:

A= l * w

A= 2 * 2

A= 4

Find the missing length of the right triangle below.
8 ft
15 ft

Answers

Answer:

23 or 19

Step-by-step explanation:

15+8= 23

23-4= 19

i added 15 and 8 because if you were to flatten the triangle it would be next to the base, so i added it. I subtracted 4 because side C doesn't look like it is is about 23 ft. it could be 20 too.

i am not exactly sure. sorry if you get it wrong. I am so sorry if i got it wrong.

Let a =[2,4,6] b=[3,7,10,13] and c= [3,4,6,7,10,13] Which of the following is true
a. Set A is Subset of Set C
b. Set B is Subset of Set C
c. Both a and b is Subset of Set C
d set B is Subset of Set a

Answers

Answer:

I think the answer is A is subset of C

During week 1 of a recycling drive, the fifth grade class recycled 9
pounds of glass and 123 pounds of newspaper. During week 2, the
fifth grade class recycled 8 pounds of glass and 13 pounds of
newspaper. How many more pounds of newspaper than glass did
the class recycle?

Answers

Answer:

119 pounds

Step-by-step explanation:

Glass :

1) 9 pounds

2) 8 pounds

9 + 8 = 17 pounds

Newspaper

1) 123 pounds

2) 13 pounds

123 + 13 = 136 pounds

136 - 17 = 119 pounds

what is 62/25 - 5/4 and find the

Answers

Answer:

123/100

Step-by-step explanation:

Answer:

Step-by-step explanation:

62 / 25 = 2.48

5 / 4 = 1.25

2.48 - 1.25 = 1.23

The faculty of a certain four-year college consists of 179 teachers. There are 663 first-year students. The student-to-faculty ratio for the entire college is 15 to 1. What is the total number of second-, third-, and fourth-year students?
A 1,989
B 2,022
C 2,652
D 2,685

Answers

9514 1404 393

Answer:

  B.  2,022

Step-by-step explanation:

The student/faculty ratio tells you the total number of students in the school is ...

  (15 students/teacher)×(179 teachers) = 2685 students

If 663 of those are first-year, then the number of upper-level students is ...

  upper-level students = total students - first-year students

  upper-level students = 2685 -663 = 2022

The total number of upper-level students is 2,022.

01101000

01101001

Step-by-step explanation:

A towns population went from 40,000 to 50,000. What was the percent of change in the population?

Answers

Answer:

The percent of change in the population was of 25%.

Step-by-step explanation:

Percent change:

The percent change is given by the change multiplied by 100, and divided by the initial value.

A towns population went from 40,000 to 50,000.

Change: 50000 - 40000 = 10000

Initial value: 40000

10000*100/40000 = 25%

The percent of change in the population was of 25%.

A line passes through the points (4,15) and (9,20). Right in line your function rule in terms of x and y for this line

Answers

Answer:

15

Step-by-step explanation:

use formula y-y1=m(x-x1)

(4,15) = (x1,y1)
(9,20)=(x2,y2)

m is the slope which you don’t have but you can find by doing (y2-y1)/(x2-x1)
m=(20-15)/(9-4)
m=5/5
m=1

y-y1=m(x-x1)
y-15=1(x-4)
y-15=x-4 |+15 to both sides
y=x +11

A savings account earns 7% annual simple interest. The principal is $1,800. What is the interest
after 6 years? What is the balance?

Answers

Answer:

The interest is $756.

The balance is $2,556.

Step-by-step explanation:

I = Prt

I = $1,800 * 0.07 * 6

I = $756

The interest is $756.

$1800 + $756 = $2,556

The balance is $2,556.

Find the circumference of the circle.

Answers

Answer:

18.85, closest answer is A.

C=2πr=2·π·3≈18.84956

PLEASE, do NOT click on any links, or DOWNLOAD suspicious files!

Help!!!!!!!!!!!!!!!!

Answers

Answer:

for Mr farley I got 70 and for Mr samuels I got also 70 and there is no difference because they both have the same mean I hope I helped

Leonardo puts $450 in a bank account that earns 3.5% simple interest. How much interest will he earn in four years?

Answers

Answer:

$63

Step-by-step explanation:

Answer:

$63

Step-by-step explanation:

Find the surface area of the prism

Answers

Answer:

dont you just add the numbers...?

Just add the numbers

I bye a notebook for $8.00. It is on sale for 20% off.
What is the sale price?

Answers

Answer:

$6.40

^w^ -ash

With the sale the notebook when then cost $6.40.

i need helppp badly ​

Answers

Answer:

Answer is D hope this helps

Step-by-step explanation:

Answer:

D) Segment BF = 18

Step-by-step explanation:

24/36=18/27

2/3=2/3

D) Segment BF = 18

can someone help me please​

Answers

Answer:

C'(-3, -3)

D'(-2, 1)

E'(-1, 0)

F'(2, -2)

Step-by-step explanation:

Add 2 to the x coordinates and subtract 2 from the y coordinates.

C'(-5+2, -1-2)

D'(-4+2, 3-2)

E'(-3+2, 2-2)

F'(-2+2, 0-2)

C'(-3,-3)

D'(-2,1)

E'(-1,0)

F'(2,-2)

If you jog 8 times around a track that is 600 meters long, how many kilometers have you covered?

Answers

Answer:

0.6 km

Step-by-step explanation:

If If you jog 8 times around a track that is 600 meters long, then 4.8  kilometers you  have covered

What is Unit of Measurement?

A Unit of measure is the actual unit in which the associated values are measured.

Given,

If you jog 8 times around a track that is 600 meters long,

We need to find how many kilometers you have covered.

8 times around a track that is 600

It means we have to multiply eight with six hundred.

8×600

=4800

We know that 1 km is 1000 m

So divide 4800 by 1000 to find in kilometers

4800/1000=4.8km

Hence If you jog 8 times around a track that is 600 meters long, Then 4.8  Kilometers you have covered.

To learn more on Units of measurement click:

https://brainly.com/question/15402847

#SPJ2

Some help pls shhsnsshnasnnansnsnsnsnsnsnsnsnsnsnsnsnnsnsnsnsndndndndndndnnrnrnrnrnfn

Answers

Answer:

Step-by-step explanation:

B

the answer is A i wish that helped :)

im stuck on this one but i have like 2 more questions left

Answers

Answer:

your answer is the third one

Step-by-step explanation:

WILL MARK BRAINLEST

Jim earns $41.25 in 5 hours. Susan earns$30.00 in 4 hours. Pierre’s hourly rate is lessthan Jim’s, but more than Susan’s. What is hishourly rate?
A.$6.50
B.$7.35
C.$7.75
D.$8.25

Answers

Answer:

C

Step-by-step explanation:

i it has to be less than gems in more than susans, Jim is making 8.25 per hour, and Susan is making 7.50 per hour.

so the only possible answer would be 7.75

hope this helps!!!

Answer:

C.

Step-by-step explanation:

Jim earns $8.25 every hour

Susan earns $7.5 every hour

So Pierre's hourly rate has to be more than $7.5 but less than $8.25, so therefore Pierre's hourly rate is $7.75 because it is less than $8.25 but more than $7.5

Help please i need i will mark you brill

Answers

Answer:

(x^2)*(56+3.42)

i think that is the answer

Step-by-step explanation:

Please help I need the answer!!!

Answers

Answer:

A

Step-by-step explanation:

a

27. Write a linear equation in slope-intercept form. An auto repair shop
charges $ 40 plus $ 20 per hour.

Help plz

Answers

Answer:

Put the 4 at the beggining at line then always at +20 to it

30 + _ = 136 Cubic feet

Answers

Answer:

106

Step-by-step explanation:

Bring the values to one side and change the signs

Always substitute in brackets

_=136+(-30)

106=136-30

Thus your answer is 106

What is the degree of the monomial 12?

Answers

The expression is constant, which means it can be rewritten with a factor of  x^ 0 . The degree is the largest exponent on the variable.  0

???????????????????????

Answers

10 x 12 = 120m² - 7 x 2 = 106m²

= 106m²

Name at least 3 angles for each diagram

Answers

Answer:

Acute angle, Obtuse angle, and Zero angle

Answer:

angle RSU.

angle RST

angle UST

Find the value of the expression.
b2 − a
for a = 4 and b = 5​

Answers

if a = 4 & b = 5 then we plug this in the expression; (5) • 2 - (4)
using PEMDAS we solve the 5• 2 first
10 - 4
6 is the answer!
hope this helps :)

The profit at a local coffee shop can be represented by the function
P=f(s) where s is the number of sales each month. Use transformations to
write a function that represents the statement “When the number of sales
doubles, the shop profit triples. However, monthly rent has increased by
$1,000 so the profit decreases by that much.”

Answers

Answer:

34#$57#+#$+5?57#?$5?75#6!56#?$57?$67?57!#

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