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
Ainat [17]
3 years ago
13

Which is a perfect square? 72 81 90 99

Mathematics
2 answers:
Tpy6a [65]3 years ago
8 0
81 is the perfect square because  9 * 9
GREYUIT [131]3 years ago
5 0
81 is the answer beacuse if you times 9*9 you get 81 aka 81 is your square hope this helped:)
You might be interested in
Please help! Need ASAP
pantera1 [17]

Answer:

nobody gonna answer this for 5 points. you have to put 1 question for each 5 points

8 0
3 years ago
What single transformation maps ∆ABC onto ∆A'B'C'? A. rotation 90° clockwise about the origin B. rotation 90° counterclockwise a
Klio2033 [76]

Answer:

B. rotation 90° counterclockwise about the origin.

Step-by-step explanation:

Transformation is the process by which the size or orientation of a given figure is altered without any effect on its shape. Examples are; rotation, reflection, translation and dilation.

Rotation is the process of turning a figure about a reference point called the origin. While reflection is turning a figure about a line to produce its image.

In the given question, ∆ABC is  mapped onto ∆A'B'C' by rotating it at 90° counterclockwise about the origin.

8 0
3 years ago
Read 2 more answers
Can someone please help
finlep [7]
I feel that the answer is length=1 width=8 and height=6
7 0
3 years ago
Carlos has taken an initial dose of a prescription medication.
Marat540 [252]

Answer:

3.48 hours

Step-by-step explanation:

The equation is:

M(t)=20 e^{-0.86t}

Where

M(t) is the amount of medication remaining in mg

t is the time it takes, in hours

The questions asks HOW LONG it will take to make the remaining medication to 1 milligrams (1 mg)??

We have to substitute M(t) with "1" and find the corresponding value of "t". We will use natural log to solve this. Shown below:

M(t)=20e^{-0.86t}\\1=20e^{-0.86t}\\0.05=e^{-0.86t}\\Ln(0.05)=Ln(e^{-0.86t})\\Ln(0.05)=(-0.86t)Ln(e)\\t=\frac{Ln(0.05)}{-0.86}\\t=3.48

<u>Note: </u> Ln(e) = 1

This means, the amount of time it will take is about 3.48 hours

8 0
3 years ago
Why is it not possible to know the exact value of an irrational number?
Firdavs [7]

Answer:

An irrational number has a repeating decimal digits that continues on infinitely

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Estimate first to the nearest whole number 6.07x3.29
    6·1 answer
  • A month with 31 days has the same number of Mondays and Wednesdays. How many of the seven days of the week could be the first da
    15·1 answer
  • a system of two linear equations has infinitely many solutions. one of the equations in the system is y-3x=-3.write an equation
    11·1 answer
  • The question: how old am I if 400 reduced by 2 times my age is 352?
    8·1 answer
  • I need help asap :):):):
    15·2 answers
  • Benny grew 5 watermelons. Joan grew 2 watermelons. How many<br>watermelons did they grow in all ?​
    12·2 answers
  • The total points scored in the games of an NBA playoff series: 195 177 215 200 189 232 201 199 192 201
    11·1 answer
  • How do you put in the square root symbol on the computer
    12·1 answer
  • Simplify the expression<br><img src="https://tex.z-dn.net/?f=%20%7B9p%7D%5E%7B4%7D%20%5C%3A%20%20%20x%20%5C%3A%20%20%28%20%7B%20
    12·1 answer
  • Find the perimeter and the area of the polygon with the given vertices. A (12,2) B (12,13) C (15,13) D (15,2)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!