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
zhannawk [14.2K]
3 years ago
9

A scientist finds the temperature of a sample at the beginning of an experiment is t degrees celcius. After 1 hour, the temperat

ure is t^2 degrees celcius. If the temperature after 1 hour is 81 degrees celcius, what are two possible original temperatures? What is the difference between the possible original temperatures?
Mathematics
2 answers:
ale4655 [162]3 years ago
6 0
So the two possible original temperatures would be either -9 or 9.
KATRIN_1 [288]3 years ago
3 0
The possible temperatures are 9 degrees or -9 degrees as t^2 means t squared so the square root of 81 is t, however -9 x -9 and 9x9 is 81 so they're both possible answers.

as for the second part I'm not sure what they specifically want. sorry
You might be interested in
What is the correct answer?
babunello [35]

Answer:

Image B shows a reflection.

6 0
3 years ago
Read 2 more answers
Write a fraction could multiply by the numver 2 and have a product greater than 2?
larisa86 [58]
Any improper fraction would work for this case since they are all greater than 1. For instance 3/2 * 2 would be equal to 3 which is greater than 2. 
8 0
3 years ago
Many older homes have electrical systems that use fuses rather than circuit breakers. A manufacturer of 40-amp fuses wants to ma
zhenek [66]

Answer:

<u>Alternative hypothesis 1</u>:  the mean amperage at which the fuses burn out is > 40 amperes.

<u>Alternative hypothesis 2</u>:  the mean amperage at which the fuses burn out is < 40 amperes.

Step-by-step explanation:

Recall that the null hypothesis is the fact you want to refute and is in doubt.

So, in this specific case, <em>the null hypothesis would be that the mean amperage at which the fuses burn out is 40 amperes. </em>

The alternative hypothesis are those that want to refute the null hypothesis, in this case there are 2:

<u>Alternative hypothesis 1:</u>  the mean amperage at which the fuses burn out is > 40 amperes.

<u>Alternative hypothesis 2:</u>  the mean amperage at which the fuses burn out is < 40 amperes.

6 0
3 years ago
What's the slope equation to points 1, 8 and 0, 5
Firdavs [7]

Answer:

m= \frac{5-8}{0-1}

-3/-1

Step-by-step explanation:

7 0
3 years ago
Find the missing side length of the triangle 10m 7.5m
xxTIMURxx [149]

Answer:

c = 12.5

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Trigonometry</u>

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

  • a is a leg
  • b is another leg
  • c is the hypotenuse<u> </u>

Step-by-step explanation:

<u>Step 1: Identify</u>

Leg <em>a</em> = 7.5

Leg <em>b</em> = 10

Hypotenuse <em>c</em> = <em>c</em>

<em />

<u>Step 2: Solve for </u><em><u>c</u></em>

  1. Substitute in variables [Pythagorean Theorem]:                                              7.5² + 10² = c²
  2. Rewrite:                                                                                                             c² = 7.5² + 10²
  3. Evaluate exponents:                                                                                         c² = 56.25 + 100
  4. Add:                                                                                                                   c² = 156.25
  5. [Equality Property] Square root both sides:                                                    c = 12.5
5 0
3 years ago
Other questions:
  • 927 is divisible by 3 and 9. (1 point)<br> true<br> false
    7·2 answers
  • The statue of liberty is 305 feet tall from the base to the torch. The statue itself is 111 feet tall. How many feet tall is the
    15·2 answers
  • Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
    12·1 answer
  • Y=4x-18<br><br> Find ordered pairs of intercepts of each line
    10·1 answer
  • How do you get this answer ?
    6·1 answer
  • ΔRST and ΔXYZ are equilateral triangles. The ratio of the perimeter of ΔRST to the perimeter of ΔXYZ is 1 to 3. The area of ΔRST
    8·1 answer
  • What is 4(x−2+y)? I need help.
    14·1 answer
  • Yo can i get some help no links or pictures only say the truth or get reported
    11·2 answers
  • -5 1/2 + 6 3/4 + (-4 1/4)
    9·1 answer
  • I am thinking of a number (s).
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!