Two boats on opposite banks of a river start moving towards each other. They first pass each other 1400 meters from one bank. They each continue to the opposite bank, immediately turn around and start back to the other bank. When they pass each other a second time, they are 600 meters from the other bank. We assume that each boat travels at a constant speed all along the journey. Find the width of the river?

Answers

Answer 1
Answer: assuming that the river doesn not move
if they kept a constand speed then they passes
the problem doesn't say how fast they were moving, but we can see that 1 boat is faster so

first pass
1400 meters from 1 bank
if they turn around they are 600 meters from the other bank
since they kept constant speed, they passed in the same place so
distance from bank1 to markx=1400
distance from bank2 to markx=600
distance from bank1 to bank2=600+1400
1400+600=total distance=2000 m

Related Questions

O,60 is the same rotation as O, A. -300 B. 120 C. 300
On a backpacking trip through Europe, Ethan bought snacks for 10 Swiss francs. If the foreign exchange rate between the U.S. dollar and Swiss franc is 1:2, how much did Ethan spend in dollars?
If y is the principal square root of 5 what must be true?
In 36 years, amy will be 3 times as old as she is right now. how old is she now?
To figure this out, fill in the blanks and do the math:x _____ seconds in a minute x _____ minutes in an hour x _____ hours in a day x _____ days in a year x __________ miles per second (speed of light) = ______________ miles in one light-year.

If a 25 ft rope is cut into two sections with one section 4 times as long as the other section, how long is the shorter piece?

Answers

x - shorter piece
4x - longer piece

x+4x=25\n 5x=25\n x=5\hbox{ ft}

The vertex of the parabola y = x2 + 8x + 10 lies in Quadrant

Answers

y = x^2 + 8x + 10\n\nThe\ vertex=(p;\ q)\ \ \ and\ \ \ p=- (b)/(2a) ;\ \ \ q=- (\Delta)/(4a) ;\ \ \ \Delta=b^2-4ac\n\n\Delta=8^2-4\cdot1\cdot10=64-40=24\n\np=- (8)/(2\cdot1) =-4\n\nq=- (24)/(4\cdot1) =-6\n\nthe\ vertex=(-4;-6)
y = x^2 + 8x + 10 \n \nthe \ standard \ form \ y = ax^2 + bx + c \n\nof \ a \ function \ into \ vertex \ form \ y = a(x - h)^2 + k ,\n \n we \ have \ to \ write \ the \ equation \ in \ the \ complete \ square \ form \n\n\ and \ vertex(h, k) \ is \ given \ by:

h = (-b)/(2a) , \ \ k = c -(b^2)/(4a ) \n \ny = a(x - h)^2+k

 opens  up for   a > 0

a=1 , \ \ b=8, \ \ c=10 \n \nh= (-8)/(2)=-4

k= 10-(8^2)/(4)=10-(64)/(4)=10-16=-6 \n \ny=(x-(-4))^2+(-6)\n \ny=(x+4)^2-6
 


Which set of polar coordinates describes the same location as the rectangular coordinates (0, -2)

Answers

Polar coordinates identifie the points of the plane by a distance from the reference point and an angle from a reference direction.

In this case the distance of (0,-2) from the origin is 2 and the anglefrom the x-axis is 180°. So the polar coordinates are (2, 180°)

 

(-2, 90 degrees) on apex

Brendan, Miguel, and Jeron run around the track. They start at the same place and at the same time. They each run at a steady rate. Brendan completes a lap in 4 minutes, Miguel completes a lap in 6 minutes, and Jeron completes a lap in3 minutes. The boys want to know how many minutes it will take after they start running until they complete a lap at the same time. How many minutes will it take Brendan, Miguel, and Jeron first complete a lap at the same time?

Answers

Answer:

It 12 if your using I-ready

Step-by-step explanation:

Game wardens use experiments to help determine the number of deer in the state of North Carolina. Suppose 120 deer are caught, tagged, and released into the wild. A month later, 800 deer are caught with 16 found to have tags. Using this information, estimate the number of deer in North Carolina. A. 50
B. 500
C. 600
D. 6,000

Answers

Given;
120 deer tagged
800 deer caught
16 out of 800 deer caught have tags

This is a proportion problem

a/b = c/d where ac = bd

16/800 = 120/d
16d = 800*120
16d = 96,000
d = 96,000 / 16
d = 6,000

The estimate number of deer in North Carolina is D. 6,000

If (7, m) is on a circle with center C(−2, 2) and radius 9, what is the value of m?

Answers

First thing I did was check the distance between the point and the center of the circle on the x-axis, because that was the information already given. Turns out that 7 - (-2) = 9, and so m is equal to the y-value of the center of the circle.

m
= 2

Hope that helps!