Life Guards

Scout Life Guard Water Safety & Red Cross Life Saving Patches
Scout Life Guard Water Safety & Red Cross Life Saving Patches
$13.50

LEGO SERIES 13 12 MINIFIGURES UNICORN SNAKE PIGGY GUY GOTH GIRL YOUR CHOICE LEG
LEGO SERIES 13 12 MINIFIGURES UNICORN SNAKE PIGGY GUY GOTH GIRL YOUR CHOICE LEG
$5.75

United States Offical Coast Guard life jacket size Large, NWT
United States Offical Coast Guard life jacket size Large, NWT
$87.69

CONNOISSEUR:  THE ROYAL DANISH LIFEGUARDS, COLOR GUARD TROOP
CONNOISSEUR: THE ROYAL DANISH LIFEGUARDS, COLOR GUARD TROOP
$124.95

Choose Your Item(s) - Lego Mini Figures 71007 Series 12 with Online Game Code
Choose Your Item(s) - Lego Mini Figures 71007 Series 12 with Online Game Code
$3.49

Burt's Bees Lifeguard's Choice Lip Balm for Sun & Snow Survival Kit
Burt's Bees Lifeguard's Choice Lip Balm for Sun & Snow Survival Kit
$44.99

LONDON ENGLAND-UK/ Troopers 1st Life Guards
LONDON ENGLAND-UK/ Troopers 1st Life Guards"Orthochrome" Vintage Postcard UNUSED
$1.35

LEGO Minifigure Series 2 - Lifeguard 8684
LEGO Minifigure Series 2 - Lifeguard 8684
$6.99

# 10 VINTAGE PHOTO LIFEGUARDS SWIMSUIT BULGE BUDDY BOYS  WILDWOOD N.J. GAY INT.
# 10 VINTAGE PHOTO LIFEGUARDS SWIMSUIT BULGE BUDDY BOYS WILDWOOD N.J. GAY INT.
$18.95

#19 VINTAGE PHOTO  AFFECTIONATE MUSCLE  LIFEGUARD SWIMSUIT BULGE BUDDY BOYS GAY
#19 VINTAGE PHOTO AFFECTIONATE MUSCLE LIFEGUARD SWIMSUIT BULGE BUDDY BOYS GAY
$18.95

550 Paracord Mil Spec Type III 7 strand parachute cord 25ft, 50ft, 100 ft
550 Paracord Mil Spec Type III 7 strand parachute cord 25ft, 50ft, 100 ft
$7.99

Vintage YMCA Swimming Chicago Lifeguard Patch Lot Pin 19x
Vintage YMCA Swimming Chicago Lifeguard Patch Lot Pin 19x
$9.95

50th Anniversary Lifeguard Badge
50th Anniversary Lifeguard Badge
$10.00

LEGO Minifigure Series 12 - Lifeguard 71007
LEGO Minifigure Series 12 - Lifeguard 71007
$5.99

Lego Town / City Set #7738 Coast Guard Helicopter and Life Raft
Lego Town / City Set #7738 Coast Guard Helicopter and Life Raft
$38.00

Lifeguard 550-LB Paracord Type III 7 strand parachute cord 100 ft Woven White
Lifeguard 550-LB Paracord Type III 7 strand parachute cord 100 ft Woven White
$2.99

Lego Series 12 Collectible Minifigure: LIFEGUARD GUY new never built red binocul
Lego Series 12 Collectible Minifigure: LIFEGUARD GUY new never built red binocul
$1.99

OLD PHOTO MEN LIFEGUARDS BOWING TO STANDING MAN ARLINGTON BEACH SWIMSUITS 1920S
OLD PHOTO MEN LIFEGUARDS BOWING TO STANDING MAN ARLINGTON BEACH SWIMSUITS 1920S
$14.99

WHITE LIFEGUARD T-SHIRT Size MEDIUM Ymca Beach Pool Club Staff Chruch
WHITE LIFEGUARD T-SHIRT Size MEDIUM Ymca Beach Pool Club Staff Chruch
$0.99

Lifeguard  Adult Hoodie Sweatshirt  Red Life Guard Brand New
Lifeguard Adult Hoodie Sweatshirt Red Life Guard Brand New
$24.95

Hot Wheels Sto & Go - Baywatch Lifeguard Rescue Station
Hot Wheels Sto & Go - Baywatch Lifeguard Rescue Station
$6.38

N Ft Myers Drop dead gorgeous LAKEFRONT!! Great GOLF,24 hour live security guard
N Ft Myers Drop dead gorgeous LAKEFRONT!! Great GOLF,24 hour live security guard
$16,400.00

LEGO #71007 Minifigure Series 12  LIFEGUARD GUY
LEGO #71007 Minifigure Series 12 LIFEGUARD GUY
$4.99

Britains Band of the Life Guards 8 MINT Soldiers
Britains Band of the Life Guards 8 MINT Soldiers
$45.00

3 Pack Hardcore Adult Life Jacket PFD Type III Coast Guard Ski Vest Purple
3 Pack Hardcore Adult Life Jacket PFD Type III Coast Guard Ski Vest Purple
$49.99

NIB Lego Set 41028 Friends Emma's Lifeguard Post
NIB Lego Set 41028 Friends Emma's Lifeguard Post
$7.50

Pendant of Life Legends of The Hidden Temple Temple Guard Prop New
Pendant of Life Legends of The Hidden Temple Temple Guard Prop New
$3.94


"HERALD" LEAD TOY SOLDIERS - LIFE GUARDS MOUNTED - SET 7801
$19.99

U. S. Coast Guard Life Boat and Life Raft Rations 8 oz Biscuits
U. S. Coast Guard Life Boat and Life Raft Rations 8 oz Biscuits
$25.00

Type II Orange Life Jacket Vest PFD - Adult Universal - Coast Guard Approved
Type II Orange Life Jacket Vest PFD - Adult Universal - Coast Guard Approved
$10.95

NWT CABANA LIFE boys bathing suit /rash guard light blue white & green size 2T
NWT CABANA LIFE boys bathing suit /rash guard light blue white & green size 2T
$5.00

ANTIQUE EDISON CYLINDER Record #9274 IMPERIAL LIFE GUARD MARCH
ANTIQUE EDISON CYLINDER Record #9274 IMPERIAL LIFE GUARD MARCH
$14.52

NEW Bottle Starlight LIFEGuard Advanced Antioxidant Therapy Nutrient 60 Tablets
NEW Bottle Starlight LIFEGuard Advanced Antioxidant Therapy Nutrient 60 Tablets
$15.99

BRITAINS The Life Guards Mount in Cloaks Set #9205 wOriginal Box
BRITAINS The Life Guards Mount in Cloaks Set #9205 wOriginal Box
$74.95

BRITAINS The Life Guards Mounted with Cloaks Set #400
BRITAINS The Life Guards Mounted with Cloaks Set #400
$49.95

U.S. Coast Guard / Million Lives Saved - USCG Brass Challenge Coin
U.S. Coast Guard / Million Lives Saved - USCG Brass Challenge Coin
$10.79

Lifeguard (DVD, 2013) Sam Elliott Anne Archer Archive Collection
Lifeguard (DVD, 2013) Sam Elliott Anne Archer Archive Collection
$4.00

Life Essential Stainless Steel Protector Finger Slice Knife Hand Guard Chop New
Life Essential Stainless Steel Protector Finger Slice Knife Hand Guard Chop New
$0.81

Kyser Lifeguard Humidifier for Acoustic Guitars NEW
Kyser Lifeguard Humidifier for Acoustic Guitars NEW
$16.29

Bud Light Lifeguard Chair w/ Buoys
Bud Light Lifeguard Chair w/ Buoys
$169.95

Custom Marvel Legends X-Men Lifeguard by Toyphilia
Custom Marvel Legends X-Men Lifeguard by Toyphilia
$75.00

BRADLEY Camo Fishing Vest Life Jacket US Coast Guard Approved PFD with 2 pockets
BRADLEY Camo Fishing Vest Life Jacket US Coast Guard Approved PFD with 2 pockets
$29.99

Lego CITY #7738: COAST GUARD HELICOPTER & LIFE RAFT no mini figs w/ instructions
Lego CITY #7738: COAST GUARD HELICOPTER & LIFE RAFT no mini figs w/ instructions
$10.50

Hamleys Britain figurines Guards 3 Lifeguard Police officer box figure
Hamleys Britain figurines Guards 3 Lifeguard Police officer box figure
$34.99

OBEY Shepard Fairey Lifeguard Not on Duty Signed Art Print Poster Paradise Turns
OBEY Shepard Fairey Lifeguard Not on Duty Signed Art Print Poster Paradise Turns
$155.00

LIFEGUARD ON DUTY DECORATIVE SIGN WALL ART BEACH HOUSE BOATING HANGING ART
LIFEGUARD ON DUTY DECORATIVE SIGN WALL ART BEACH HOUSE BOATING HANGING ART
$6.99

Vintage Britains Painted Lead Life Guards x 2 (Moving Arm) on Horseback, 1 AF
Vintage Britains Painted Lead Life Guards x 2 (Moving Arm) on Horseback, 1 AF
$5.94

TETRA LIFEGUARD 32 TAB ALL IN ONE TREATMENT FISH DISEASES, ICK, FUNGAL, BACTERIA
TETRA LIFEGUARD 32 TAB ALL IN ONE TREATMENT FISH DISEASES, ICK, FUNGAL, BACTERIA
$10.70

LEGO Collectible Minifugres Series 12 - Lifeguard
LEGO Collectible Minifugres Series 12 - Lifeguard
$3.25

The Lifeguard DVD
The Lifeguard DVD
$0.99

Wildfox Couture The Lifeguard Cropped Muscle Tank Size XS SHARK SUMMER
Wildfox Couture The Lifeguard Cropped Muscle Tank Size XS SHARK SUMMER
$19.99

Filter Guard-Bio Sponge Filter Live Aquarium Fish Tank
Filter Guard-Bio Sponge Filter Live Aquarium Fish Tank
$2.95

Mattel Barbie Beach Outfit, Lifeguard stand and Barbie doll
Mattel Barbie Beach Outfit, Lifeguard stand and Barbie doll
$10.00

Vintage Mead Trapper Keeper Surf's Up! Shark Lifeguard 1991 Ken Westphal Design
Vintage Mead Trapper Keeper Surf's Up! Shark Lifeguard 1991 Ken Westphal Design
$24.99

TOYOTA TACOMA LIFEGUARD DAMAGED ≈  Matchbox 2014 ≈ Case J
TOYOTA TACOMA LIFEGUARD DAMAGED ≈ Matchbox 2014 ≈ Case J
$0.99

2014 MATCHBOX
2014 MATCHBOX "TOYOTA TACOMA"--LIFE GUARD--NEW RELEASE
$0.99

VINTAGE BRITAINS METAL MODELS TOY SOLDIERS #7228 3 HORSE MOUNTED LIFEGUARDS
VINTAGE BRITAINS METAL MODELS TOY SOLDIERS #7228 3 HORSE MOUNTED LIFEGUARDS
$14.99

LACO FD BAYWATCH LIFEGUARD PARAMEDIC CALI. (NOV 2014) FIRE PATCH
LACO FD BAYWATCH LIFEGUARD PARAMEDIC CALI. (NOV 2014) FIRE PATCH
$5.00

LEGO Minifigure Series 12 - Lifeguard 71007
LEGO Minifigure Series 12 - Lifeguard 71007
$0.99

W, Britain NIB The Life Guards Mounted Band #5295 Set #2 Limited Edition
W, Britain NIB The Life Guards Mounted Band #5295 Set #2 Limited Edition
$150.00

LIFEGUARD - 5
LIFEGUARD - 5" Russ Troll Doll - NEW IN ORIGINAL WRAPPER
$9.95

LEGO Friends Emma's Lifeguard Post (41028)- New In Package
LEGO Friends Emma's Lifeguard Post (41028)- New In Package
$9.99

Vintage  Male Life Guard in Swim Suit 1923 Snapshot, Davenport,  Iowa 3
Vintage Male Life Guard in Swim Suit 1923 Snapshot, Davenport, Iowa 3"x4 1/2"
$4.99

jersey lifeguard boat christmas ornaments
jersey lifeguard boat christmas ornaments
$9.99

Lifeguard Swimsuit Red Flyback One Piece by ELifeguard size 36
Lifeguard Swimsuit Red Flyback One Piece by ELifeguard size 36
$9.99

Speedo Lifeguard Flyback Set
Speedo Lifeguard Flyback Set
$7.45

(10) Guard Rails Life Like HO Slot Track Like-Like
(10) Guard Rails Life Like HO Slot Track Like-Like
$9.99

Britains Metal Models Lifeguard Trumpeter & Blues and Royal Farrier 1983
Britains Metal Models Lifeguard Trumpeter & Blues and Royal Farrier 1983
$5.00

Vintage DOLFIN Shorts Uniform Lifeguard Swimming Sleep Briefs Tights Womens S
Vintage DOLFIN Shorts Uniform Lifeguard Swimming Sleep Briefs Tights Womens S
$10.95

LEGO NEW SERIES 12 MINIFIGURES 71007 YOU PICK MINIFIGS UNUSED ONLINE GAME CODE
LEGO NEW SERIES 12 MINIFIGURES 71007 YOU PICK MINIFIGS UNUSED ONLINE GAME CODE
$5.39

Blenheim Mounted Life/Horse Guards w Kettle Drums/Horns toy soldiers
Blenheim Mounted Life/Horse Guards w Kettle Drums/Horns toy soldiers
$59.99

Vintage Painted Lead Mounted Life Guards x 3, Crescent, Johillco?
Vintage Painted Lead Mounted Life Guards x 3, Crescent, Johillco?
$7.44

BMW JAGUAR AUDI MERCEDES BENZ ZF LIFEGUARD 6 AUTO TRANSMISSION FLUID
BMW JAGUAR AUDI MERCEDES BENZ ZF LIFEGUARD 6 AUTO TRANSMISSION FLUID
$22.95

Pottery Barn Sign Painting Lifeguard On Duty Beach
Pottery Barn Sign Painting Lifeguard On Duty Beach
$0.99

1930 Unsinkable US Coast Guard Life Boat Designed by Alfred Hansen Press Photo
1930 Unsinkable US Coast Guard Life Boat Designed by Alfred Hansen Press Photo
$9.99

Lifeguard (DVD, 2005, Widescreen Collection)
Lifeguard (DVD, 2005, Widescreen Collection)
$7.99

OEM ZF Lifeguard 6  Automatic Transmission Fluid    S671090255
OEM ZF Lifeguard 6 Automatic Transmission Fluid S671090255
$26.00

c1940  Original Photo of 26 men & women LIFE GUARDS @ Southern Califonia beach
c1940 Original Photo of 26 men & women LIFE GUARDS @ Southern Califonia beach
$44.00

LEGO MINIFIGURE SERIES 12 LIFEGUARD GUY !!!!!
LEGO MINIFIGURE SERIES 12 LIFEGUARD GUY !!!!!
$2.26

LEGENDS Of The HIDDEN TEMPLE Antique Bronze PENDANT OF LIFE Necklace NEW Guard
LEGENDS Of The HIDDEN TEMPLE Antique Bronze PENDANT OF LIFE Necklace NEW Guard
$10.99

Zvezda 1:72 #8018 Lifeguard Cossacks 1812-1814
Zvezda 1:72 #8018 Lifeguard Cossacks 1812-1814
$0.99

SPEEDO*ENDURANCE Lifeguard-Style Suit in Abstract Lilac/Purple Shades..38-L-NWOT
SPEEDO*ENDURANCE Lifeguard-Style Suit in Abstract Lilac/Purple Shades..38-L-NWOT
$16.90

LEGO Series 12 71007 Minifigure of LIFE GUARD w/ Random Online Code
LEGO Series 12 71007 Minifigure of LIFE GUARD w/ Random Online Code
$4.99

County of Los Angeles Life Guard Fire Department
County of Los Angeles Life Guard Fire Department
$4.00

 3 BARBIE DOLL Clothes- LIFEGUARD Bathing Suit, Red Sparkly Top, Purple Dog Top
3 BARBIE DOLL Clothes- LIFEGUARD Bathing Suit, Red Sparkly Top, Purple Dog Top
$0.99

Lego Minifigures Series 12 Pick 71007 Piggy Guy Hun Warrior Wizard Spooky Girl
Lego Minifigures Series 12 Pick 71007 Piggy Guy Hun Warrior Wizard Spooky Girl
$5.95

N.J. LIFEGUARD SKIFF 1/12TH SCALE 16 INCHES LONG
N.J. LIFEGUARD SKIFF 1/12TH SCALE 16 INCHES LONG
$18.00

Samsung Galaxy s3 Mini i8190 Live Life Quote Fashion Phone Case Cover Guard
Samsung Galaxy s3 Mini i8190 Live Life Quote Fashion Phone Case Cover Guard
$4.79

Life Jacket Vest Adult PFD Type III Fully Enclosed US Coast Guard Approved SAFE!
Life Jacket Vest Adult PFD Type III Fully Enclosed US Coast Guard Approved SAFE!
$33.57

British Household Cavalry white leather gauntlets Gloves Life Horse Guards
British Household Cavalry white leather gauntlets Gloves Life Horse Guards
$37.56

British Household Cavalry white leather gauntlets Gloves Life Horse Guards
British Household Cavalry white leather gauntlets Gloves Life Horse Guards
$37.56

Lego Lifeguard Station / Referee Stand 41008 Friends Sports Pool Tennis Beach
Lego Lifeguard Station / Referee Stand 41008 Friends Sports Pool Tennis Beach
$8.95

Army Household Cavalry White leather Breeches Life Horse Guards Ceremonial
Army Household Cavalry White leather Breeches Life Horse Guards Ceremonial
$60.10

Seaside Heights NJ-  OCEAN LIFEGUARD BEACH PATROL Annuals 1981 - 2004 (17 Edtns)
Seaside Heights NJ- OCEAN LIFEGUARD BEACH PATROL Annuals 1981 - 2004 (17 Edtns)
$9.99

Lifeguard Life Guard Adult Pullover Hoodie Sweatshirt Adult Red White New S-XL
Lifeguard Life Guard Adult Pullover Hoodie Sweatshirt Adult Red White New S-XL
$28.49

Britains repaint Life Guard trooper cavalry, metal 54mm figure, England Bussler
Britains repaint Life Guard trooper cavalry, metal 54mm figure, England Bussler
$7.99


"I Can Be a Lifeguard" Barbie Doll playset & 2 Barbie "Mermaids" Lot of 3 total
$10.99

5x Clear LCD Screen Protector Guard Film Kyocera Hydro Icon C6730 / Life C6530N
5x Clear LCD Screen Protector Guard Film Kyocera Hydro Icon C6730 / Life C6530N
$2.88

Salvation Army - Cloth Patch - Life Saving Guards
Salvation Army - Cloth Patch - Life Saving Guards
$4.95

Salvation Army - Cloth Patch - Life Saving Girl Guards
Salvation Army - Cloth Patch - Life Saving Girl Guards
$4.95

From a raft 50 meters offshore, a life guard wants to swim to shore and run to a snack bar 100 meters down the?

From a raft 50 meters offshore, a life guard wants to swim to shore and run to a snack bar 100 meters down the beach.
a)if the life guard swims at 1 m/s and runs 3 m/s, express the total swimming and running time t as a function the distance x ( in other words, find t(x).
b)using your answer from part , find the minimum time.

Let a 90 degree angle be a point on shore 100 meters from the snack bar and 50 meters from the raft.

Let x = a point on the beach to swim x meters from the right angle
( 0 <= x <= 100 )

Total distance = sqrt(50^2 + x^2) + 100 - x ... in meters

t (x) = sqrt(50^2 + x^2) / 1 + (100 - x) / 3 ... in seconds

t ' (x) = x / sqrt(x^2 + 2500) - 1/3
x / sqrt(x^2 + 2500) - 1/3 = 0
x = 25 / sqrt(2)

t(25/√2) = sqrt(50^2 + (25/sqrt(2))^2) / 1 + (100 - 25/sqrt(2)) / 3
t(25/√2) = 75 / sqrt(2) + (100 - 25/sqrt(2)) / 3

(about) 80.47 seconds
by swimming to a point on the beach
100 - 25/sqrt(2) (about 82.3) meters from the snack bar

Queens Life Guard

Comments are closed.