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
Zinaida [17]
3 years ago
8

At the beginning of an experiment, the temperature of a solution was 48°C. During a 6-hour

Mathematics
1 answer:
ExtremeBDS [4]3 years ago
8 0

9514 1404 393

Answer:

  • -2.2(6) +1.8(4) . . . temperature change
  • 42 °C

Step-by-step explanation:

At the end of the first 6 hours, the temperature change was ...

  (-2.2 K/h)(6 h) = -13.2 K

The change in the next 4 hours was ...

  (1.8 K/h)(4 h) = 7.2 K

Then the total change over the 10-hour period was ...

  (-2.2)(6) +(1.8)(4) . . . . . expression for temperature change

This evaluates to -13.2 +7.2 = -6.

__

The final temperature is the sum of the initial temperature and the temperature change:

  final temperature = 48 °C -6 °C = 42 °C

_____

<em>Additional comment</em>

When temperature is measured on the Celsius scale, a change of 1 degree is called a kelvin (K).

You might be interested in
HELP ME A cheetah ran 75 meters at a speed of 25 meters per second. How long was the cheetah running?
zepelin [54]
3 seconds is the correct answer :)
6 0
2 years ago
Read 2 more answers
I need help pls I don’t understand it
Montano1993 [528]
12x12 + 12x12 = 288 = root of 288= 16.97
7 0
2 years ago
Two circles have radii of 4 units and 6 units. What is the radius of a circle whose area is equal to the sum of the areas of the
Bumek [7]

Answer:

Step-by-step explanation:

We that the area of a circle is Pi times r^2 where r is the radius

Let A be the area of the first circle and S the area of the second one and T the total one

A=4^2× Pi

S=6^2× Pi

T = Pi( 4^2 +6^2)

= Pi ( 16+36) = Pi× 52

52 is the radius square

So r = root square 52 = 2 root square 13

3 0
2 years ago
A rectangular piece of land borders a wall. The land is to be enclosed and to be into divided 3 equal plots with 200 feet of fen
baherus [9]

Answer:

Area = 2500 square feet is the largest area enclosed

Step-by-step explanation:

A rectangular piece of land borders a wall. The land is to be enclosed and to be into divided 3 equal plots with 200 feet of fencing

Let x be the length of each box and y be the width of the box

Perimeter of the box= 3(length ) + 4(width)

200=3x+4y

solve for y

200=3x+4y

200-3x=4y

divide both sides by 4

y=50-\frac{3x}{4}

Area of the rectangle = length times width

Area = 3x \cdot y

Area = 3x \cdot (50-\frac{3x}{4})

A=150x-\frac{9x^2}{4}

Now take derivative

A'=150-\frac{9x}{2}

Set it =0 and solve for x

0=150-\frac{9x}{2}

150=\frac{9x}{2}

multiply both sides by 2/9

x=\frac{100}{3}

A''=-\frac{9}{2}

For any value of x, second derivative is negative

So maximum at x= 100/3

 A=150x-\frac{9x^2}{4} , replace the value of x

A=150(\frac{100}{3})-\frac{9(\frac{100}{3})^2}{4})

Area = 2500 square feet is the largest area enclosed

3 0
2 years ago
Will give Brainliest! if right!
maksim [4K]
The answer is B 36 because the chance of you grabbing a white or black is 12/15 meaning if you pulled 15 marbles, most likely 12 of them are white or black. so, because 15 goes into 45 3 times, you multiply 12/15 by 3 getting 36/ 45 meaning you will mostly pull 26 black or white marbles.
6 0
3 years ago
Other questions:
  • At 3:00 p.m., Jamie leaves her house and drives north to the beach. She arrives at 5:30 p.m. Also leaving at 3:00 p.m., her brot
    7·1 answer
  • Use the greatest common factor and the distributive property to write and an equivalent expression: 20g+24h
    8·1 answer
  • What is the domain of the function y=2 sqrt x-5?
    8·1 answer
  • Jacob has a board that is 93 inches long. How many pieces can he cut that are 6.4 inches long? Round to the nearest hundredth.
    6·2 answers
  • Help me with this please don’t understand need answers please !
    15·1 answer
  • Find<br>a,b<br>such<br>that 7.2, a, b, 3 are in A.P.​
    7·1 answer
  • Which statement is true? HELP!
    7·1 answer
  • Why did the picture go to jail (big ideas math puzzle time, red book,common core)?
    6·2 answers
  • A fruit seller bought 75 mangoes and 125 apples from vendor. Find the ratio mangoes to apples bought.
    11·2 answers
  • An English muffin and two fried eggs contain 330 calories. Three English muffins and
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!