1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
faust18 [17]
3 years ago
14

Two landscapers must mow a rectangular lawn that measures 100 feet by 200 feet. Each wants to mow no more than half of the lawn.

The first starts by mowing around the outside of the lawn. How wide a strip must the first landscaper mow on each of the four sides in order to mow no more than half of the lawn? The mower has a 24-inch cut. Approximate the required number of trips around the lawn.
Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0

The total area of the complete lawn is (100-ft x 200-ft) = 20,000 ft².
One half of the lawn is  10,000 ft².  That's the limit that the first man
must be careful not to exceed, lest he blindly mow a couple of blades
more than his partner does, and become the laughing stock of the whole
company when the word gets around.  10,000 ft² ... no mas !

When you think about it ... massage it and roll it around in your
mind's eye, and then soon give up and make yourself a sketch ...
you realize that if he starts along the length of the field, then with
a 2-ft cut, the lengths of the strips he cuts will line up like this:

First lap:
       (200 - 0) = 200
       (100 - 2) = 98
       (200 - 2) = 198
       (100 - 4) = 96    

Second lap:
       (200 - 4) = 196
       (100 - 6) = 94
       (200 - 6) = 194
       (100 - 8) = 92   

Third lap:
       (200 - 8) = 192
       (100 - 10) = 90
       (200 - 10) = 190
       (100 - 12) = 88 

These are the lengths of each strip.  They're 2-ft wide, so the area
of each one is (2 x the length). 

I expected to be able to see a pattern developing, but my brain cells
are too fatigued and I don't see it.  So I'll just keep going for another
lap, then add up all the areas and see how close he is:

Fourth lap:
       (200 - 12) = 188
       (100 - 14) = 86
       (200 - 14) = 186
       (100 - 16) = 84 

So far, after four laps around the yard, the 16 lengths add up to
2,272-ft, for a total area of 4,544-ft².  If I kept this up, I'd need to do
at least four more laps ... probably more, because they're getting smaller
all the time, so each lap contributes less area than the last one did.

Hey ! Maybe that's the key to the approximate pattern !

Each lap around the yard mows a 2-ft strip along the length ... twice ...
and a 2-ft strip along the width ... twice.  (Approximately.)  So the area
that gets mowed around each lap is (2-ft) x (the perimeter of the rectangle),
(approximately), and then the NEXT lap is a rectangle with 4-ft less length
and 4-ft less width.

So now we have rectangles measuring

         (200 x 100),  (196 x 96),  (192 x 92),  (188 x 88),  (184 x 84) ... etc.

and the areas of their rectangular strips are
           1200-ft², 1168-ft², 1136-ft², 1104-ft², 1072-ft² ... etc.

==> I see that the areas are decreasing by 32-ft² each lap.
       So the next few laps are 
               1040-ft², 1008-ft², 976-ft², 944-ft², 912-ft² ... etc. 

How much area do we have now:

             After 9 laps,    Area =   9,648-ft²
             After 10 laps,  Area = 10,560-ft².

And there you are ... Somewhere during the 10th lap, he'll need to
stop and call the company surveyor, to come out, measure up, walk
in front of the mower, and put down a yellow chalk-line exactly where
the total becomes 10,000-ft².   


There must still be an easier way to do it.  For now, however, I'll leave it
there, and go with my answer of:  During the 10th lap.

You might be interested in
What is the scientific notation of 832,000
bonufazy [111]
                                                                          
The scientific notation of 832,000 is <span>8.32 × (10)to the fifth power.
Have a great day!


</span>
6 0
3 years ago
What is the equation in slope-intercept form of a line (y = mx + b) that has aslope of 3 y-intercept of 6?
arsen [322]

The equation of the line is y = 3x + 6

<h3>What are linear equations?</h3>

Linear equations are equations that have constant average rates of change.

Note that the constant average rates of change can also be regarded as the slope or the gradient

<h3>How to determine the equation of the line?</h3>

The given parameters are

Slope, m = 3

y-intercept, c = 6

A linear equation is represented as

y = slope * x + y-intercept

i.e.

y = mx + c

So, we have

y = 3x + 6

Hence. the linear equation is y = 3x + 6

Read more about linear equation at

brainly.com/question/14323743

#SPJ1

5 0
1 year ago
Resistance is a force that __________. A. speeds objects up B. slows objects down C. changes an object's inertia D. does not rel
jekas [21]
<span>Resistance is a force that B. Slows objects down. It is a force that opposes the motion of an object. This is why objects exerting an effort force must overcome the resistance force in order to do work. There are various types of resistance forces such as friction (ex. air resistance) and drag force.</span>
3 0
2 years ago
Read 2 more answers
Ms. Higdon is planning her wedding. One venue charges
Diano4ka-milaya [45]

Answer:

80 people would need  to attend for the venues to cost the same amount.

Step-by-step explanation:

Let the total number of people who attend the wedding  = m

The venue charges of venue 1 = $10,000

The per person charge of Venue 1  = $25 per person

So, the charge for m people  =  m x ($25)  = 25 m

So ,The total charge of Venue 1 = Venue Charge  +  People Cost

= $10, 000 + 25 m

Now, The per person charge of Venue 2  = $150 per person

So, the charge for m people  =  m x ($150)  = 150 m

So ,The total charge of Venue 2 =   150 m

According to question:

For m people both charges are equal  ⇒ $10, 000 + 25 m  = 150 m

or, 10,000 = 150 m - 25 m

⇒ 125  m  = 10,000

⇒ m  = 10,000 / 125 = 80

or, m  = 80

Hence,  80 people would need  to attend for the venues to cost the same amount.

3 0
3 years ago
Pllleeeeeeaaaaseeeee heeeellllp
Grace [21]
The answer would be C since you have to distribute hope I helped
7 0
3 years ago
Read 2 more answers
Other questions:
  • Please help I really need it on this one thank you
    9·1 answer
  • Can you guys help me in 2 3 4 5 pls
    5·2 answers
  • Avg these<br> 190258.50<br> 152698.00<br> 122753.00<br> 220523.00<br> 231951.00
    8·1 answer
  • Doesanyoneknowtheanswertothis???
    14·1 answer
  • What is the square root of -^54/6+2/3
    12·1 answer
  • Which of the following equations is equivalent to b' = x?
    8·1 answer
  • 6. Determine the Distance between (8, -2) and (9, 3) ?
    9·2 answers
  • M_DUL+ m_LUG=<br> MZDUG<br> Completing measure proofs
    10·1 answer
  • PLS HELP I WILL MARK BRAINLIEST
    6·2 answers
  • If the area of the trapezoid shown is 200 square feet, what is the height h of the trapezoid?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!