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
Lubov Fominskaja [6]
2 years ago
15

Suppose you cool a pot of soup in a 20℃ room. Right when you take the soup off the stove, you measure its temperature to be 180℃

. After 20 minutes, the soup has cooled to 100℃. Suppose you can eat the soup when it is 80℃. How long will it take to cool to this temperature? What will be the temperature of the soup after 45 minutes?
Mathematics
1 answer:
lara31 [8.8K]2 years ago
3 0

Answer:

it will be cool to 220℅because heat is increase by 100degrees in every after 20 minutes

You might be interested in
How do you solve -12n^2-11n=-15<br> Solve for n
Anettt [7]
Explanation:

N= 3/4 or n= -5/3
8 0
3 years ago
5) Mario owns a plumbing business. He charges an hourly rate plus a onetime set up fee. His first job was 4 hours and he charged
Wittaler [7]

Answer:

Results are below.

Step-by-step explanation:

<u>First, we need to calculate the variable income per job:</u>

<u />

First job= 450 - 150= 300

Second job= 675 - 150= 525

<u>Now, the hourly rate:</u>

<u></u>

Hourly rate= total variable income / number of hours

First job= 300 / 4= $75

Second job= 525 / 3= $175

It is probably that the second job was 7 hours long. If not, he doesn't charge the same amount per hour

5 0
3 years ago
What times to 18 but adds to 19
Bingel [31]
1 and 18 1 × 18 = 8 1+ 18 = 19
8 0
3 years ago
Find the characteristic polynomial of A. Use x for the variable in your polynomial.You do not need to factor your polynomial. A
Vesna [10]

Answer:  The required characteristic polynomial of the given matrix A is x^3+6x+11x+6=0.

Step-by-step explanation:  We are given to find the characteristic polynomial  of the following 3 × 3 matrix A  with unknown variable x :

A=\left[\begin{array}{ccc}0&0&1\\4&-3&4\\-2&0&-3\end{array}\right].

We know that

for any square matrix M, the characteristic polynomial is given by

|M-xI|=0, where I is an identity matrix of same order as M.

Therefore, the characteristic polynomial of matrix A is

|A-xI|=0\\\\\\\Rightarrow \left|\left[\begin{array}{ccc}0&0&1\\4&-3&4\\-2&0&-3\end{array}\right]-x\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]\right|=0\\\\\\\Rightarrow \left|\left[\begin{array}{ccc}-x&0&1\\4&-3-x&4\\-2&0&-3-x\end{array}\right] \right|=0\\\\\\\Rightarrow -x(3+x)^2+1(0-6-2x)=0\\\\\Rightarrow  (x+3)(-3x-x^2-2)=0\\\\\Rightarrow (x+3)(x^2+3x+2)=0\\\\\Rightarrow x^3+6x+11x+6=0.

Thus, the required characteristic polynomial of the given matrix A is x^3+6x+11x+6=0.

6 0
3 years ago
What type of model should be used to make a prediction from the given data?
GenaCL600 [577]
I think that the answer is quadratic
7 0
3 years ago
Read 2 more answers
Other questions:
  • A cook had 15 eggs to scramble and equally serve 4 people. Which location on a number line correctly indicates the number of egg
    8·1 answer
  • Jim is climbing a mountain that has a base 150 feet above sea level. If he climbs 233 feet then descends into a cave 64 feet, ho
    14·1 answer
  • Twenty-eight people in student council are running for the offices of president and vice-president. In how many different ways c
    15·1 answer
  • A rectangular piece of metal is 20 in longer than it is wide. Squares with sides 4 in long are cut from the four corners and the
    6·1 answer
  • Two factories I and II produce phones for brand ABC. Factory I produces 60% of all ABC phones, and factory II produces 40%. 10%
    9·1 answer
  • Greta’s family drinks 3 1/4 quarts of milk and 1 5/6 quarts of juice in one week. About how much more does Greta’s family drink
    7·1 answer
  • The number of cows on a farm increased by 60. Because of better food, the amount of milk from each cow went up from 12.8 liters
    5·1 answer
  • Think your a pro at riddles?
    6·1 answer
  • Find the measurement of angle X<br><br> A) 91°<br> C) 1360<br> B) 1050<br> D) 100°
    9·1 answer
  • Can someone plz explain and gimme the answer...
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!