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
Minchanka [31]
3 years ago
6

Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/h back downstream to her starting point. If her total r

owing time is 48 min, for how long does she row upstream? Express your answer to the nearest minute.
Mathematics
2 answers:
sergey [27]3 years ago
7 0

Answer:

about 26.

Step-by-step explanation:


Akimi4 [234]3 years ago
5 0
<span>Find the round trip distance:
4.95 km/hr * 48 min * 1 hr/60 min = 3.96 km
1.98 km each way

d = r*t
t = d/r = 1.98/4.5
t = 0.44 hrs upstream
t = 26.4 minutes upstream</span>
You might be interested in
Why would i use a straightedge to measure the length of a segment?
Simora [160]
You would measure the length of a segment with a straightedge because it is free from curves and can help measure a segment because it is straight.
6 0
3 years ago
4x-2y=12<br> -4x-9=54<br><br> How can you order a ladder?
blagie [28]
Equations:

4x - 2y = 12
-4x - 9y = 54

Multiple them in both sides

4x - 2y - 4x - 9y = 12 + 54
-2y - 9y = 66
-11y = 66
y= -6

If y= -6 then put y in first or second equation.

I put it in first equation

4x - 2.(-6) = 12
4x + 12 = 12
x= 0

Therefore

(x,y) = (0, -6)
3 0
3 years ago
A rectangular tank that is 2048 ft cubed with a square base and open top is to be constructed of sheet steel of a given thicknes
ira [324]

Answer:

The box should have base 16ft by 16ft and height 8ft Therefore,dimensions are 16 ft by 16 ft by 8 ft

Step-by-step explanation:

We were given the volume of the tank as, 2048 cubic feet.

Form minimum weight, the surface area must be minimum.

Let the height be h and the lengths be x

the volume will be: V=x²h then substitute the value of volume, we have

2048=hx²

hence

h=2048/x²

Since the amount of material used is directly proportional to the surface area, then the material needs to be minimized by minimizing the surface area.

The surface area of the box described is

A=x²+4xh

Then substitute h into the Area equation we have

A= x² + 4x(2048/x²)

A= x² + 8192/x

We want to minimize

A

dA/dx = -8192/x² + 2 x= 0 for max or min

when dA/dx=0

dA/dx= 2x-8192/x²=0

2x=8192/x²

Hence

2x³=8192

x³=4096

x=₃√(4096)

X=16ft

Then h=2048/x²

h=2048/16²

h=8ft

The box should have base 16ft by 16ft and height 8ft

Hence the dimensions are 16 ft by 16 ft by 8 ft

8 0
3 years ago
What is the domain of the relation below?
Andrei [34K]

Answer:

the answer : domain is third one

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
​f(x)=5​x reflected over the x axis
postnew [5]

Answer:

f(x) = -5x

Step-by-step explanation:

Just add a - sign to reflect it over the x axis

6 0
3 years ago
Other questions:
  • Factor completely x^3-8x^2-2x+16=
    11·1 answer
  • 99 POINT QUESTION!!!!!
    15·2 answers
  • What is the ratio 10:32 (10 to 32) in its simplest form?
    12·2 answers
  • susan's algebra class begins with 36 students. of 2/3 will finish the class and 3/4 of those ger a passing grade, how many stude
    13·1 answer
  • A line passes through (2,-7)and (-3,3).Find the slope-intercept form of the equation of the line. Then fill in the value of the
    12·1 answer
  • 2 Evaluate the expression 72 + 6 x 2.​
    13·2 answers
  • What are two fractions equal to 2/5?
    10·2 answers
  • s<img src="https://tex.z-dn.net/?f=elect%20all%20of%20the%20following%20expressions%20that%20are%20equivalent%20to%204%E2%88%9A5
    6·1 answer
  • Which value is not in the range of the function? А. 0<br> B. 3 <br>C. 4 <br>D. 5​
    6·1 answer
  • The ratio of the ages of father and son is 9:2.If the father is 45 ages old,find the ages of son. ​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!