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
Mnenie [13.5K]
2 years ago
13

Find the number, if 80% of it is 6.4

Mathematics
1 answer:
Igoryamba2 years ago
8 0
.8 * 6.4= 5.12
80% of 6.4 is 5.12
You might be interested in
What is (-2)4 times (-2)2 simplify
maw [93]

(-2)4 * (-2)2

= 8 * 4

32

4 0
2 years ago
Read 2 more answers
Help please been stuck on this for a week.
Anettt [7]
They give the formula as:
Surface Area =<span> (2 • <span>π <span>• r²) + (2 • <span>π • r • height)</span></span></span></span>
However the 2*PI*r^2 part of the formula is used to calculate the 2 "ends" of a cylinder.  Since the problem states that you are NOT to count any of surface area of the "ends" then you only need the <span>(2 • <span>π • r • height) part of the formula.
So, r = 3 inches and height = 8 * 3 inches, the side area equals
2 * PI * r * height
2 * 3.14159 * 3 * 24 =
</span></span>
<span> <span> <span> 452.39 cubic inches which is the lateral area.</span></span></span>



6 0
3 years ago
In Still Water, Peters Boat Goes 4 Times as Fast as the Current of the River. He Took a Trip 15 Miles Up the River, Then Came Ba
inn [45]

Answer:

2 km/h

Step-by-step explanation:

Let

Rate of river current = x km/h

Speed of Peter's boat = 4x km/h

He takes 15 km trip up (opposite direction)

His speed upstream = 4x - x

= 3x

His speed is 3x and distance is 15 km

Time = Distance / Speed

15/3x

= 5/x

And

Moving downstream (same direction)

Speed will be 4x + x = 5x

Distance = 15km,

speed = 5x

Time = Distance / Speed

= 15/5x

= 3/x

Total time take for trip = 4 hours

Total time take for trip = upstream + downstream

4 =5/x + 3/x

4 = 8/x

Cross product

4 * x = 8

x = 8/4

x = 2

Rate of river current = x km/h

= 2 km/h

3 0
3 years ago
What is the domain for the piece of the function represented by f(x)=x+1
babunello [35]

Answer:

(-∞, ∞)

Step-by-step explanation:

As you can see for each value of x , f(x) is defined

example , for x = -8000 , f(x) is defined to be -7999.

                 for x = 0 , f(x) is defined to be 1.

                 for x = 8000 , f(x) is defined to be 8001.

Also,

By its graph , Which is a straight line , So, it is defined everywhere

Thus,

its domain is (-∞, ∞)

7 0
3 years ago
Could 10.6cm,5.6cm,and 4.0 cm be the length of a triangle
Gemiola [76]
Yes it can you can use this website to draw a triangle

https://www.geogebra.org/m/JT5UmZ8w 
6 0
3 years ago
Read 2 more answers
Other questions:
  • suppose the correlation coefficient between the number of the college students in a city and the number of city buses is 0.89. w
    15·2 answers
  • Explain the process for finding the product of 2 integers
    7·1 answer
  • If your annual salary is 24700 what is your monthly salary
    6·2 answers
  • Find x, if 36, x, x, 16 are in proportion.<br><br>please tell fast​
    7·2 answers
  • Nov 09, 17:58:28 AM
    11·1 answer
  • Help please I will mark brainliest for the first person who answers ​
    7·2 answers
  • Need help i am really confused
    7·1 answer
  • PLEASE HELP RN!!!!!!!!!
    11·1 answer
  • Can you answer this math homework? Please!
    6·2 answers
  • Solve eight and two fourths minus three and one third
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!