what is the estimate of 8.1x4.2?
A. close to 3.2. B. close to 0.32 C. close to 320 or D. close to 32?
Answers
Answer:
8.1x^4 x 0.2 = 1.62x^4
Step-by-step explanation:
The estimated multiplication of 8.1 and 4.2 is close to 32.
What is a decimal?A decimal is represented by a dot that separates the whole part and the fractional part of a number. Decimals can also be converted into fractions and vice versa.
Estimations are essential when we don't have a tool to calculate the exact value of something.
Given A multiplication of two decimal numbers 8.1 and 4.2.
Now 8.1 can be estimated as 8 and 4.2 can be estimated as 4 and we know 8 times 4 is 32 so, the multiplication of 8.1 and 4.2 is close to 32.
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Related Questions
What is the smallest whole number that can be multiplied by 300 such that the product is a perfect cube?
Answers
300=2×2×5×5×3
We observe that 2 and 5 are grouped in pairs and the 3 is left unpaired.
If we multiply 300 by the factor 3 then
300×3=2×2×5×5×3×3
900=2×2×5×5×3×3 which is a perfect square.
∴ Required number is 3
root of 900 =30
Suppose that during it's flight, the elevation `e` (in feet) of a certain airplane and its time `t,` in minutes since takeoff, are related by a linear equation.
Consider the graph of this equation, with time represented on the horizontal axis and elevation on the vertical axis.
For each situation, decide if the slope is positive, zero, or negative.
Answers
Answer:
A: zero
B: negative
C: positive
Step-by-step explanation:
the key words just tell you for A it was cruising B it was negative because descending and C is positive because ascending.
(BRIANLEIST) HELP
True or False
Answers
Answer:
True
Step-by-step explanation:
Algebra question I don’t get it because you usually have to multiple A by C but there is no C in the problem.
Answers
And in this case, you are factorising in this question. You turn back into brackets basically.
We have:
72x^2 - 32
x^2 = x squared
factorising means finding the factor of.
(Forget the x squared for the moment to make life easier)
Factors of 72:
1 and 72
2 and 36
3 and 24
4 and 18
6 and 12
8 and 9
(9 and 8 = it repeats so we stop there)
And then factors of 32:
1 and 32
2 and 16
4 and 8
(8 and 4 = repeats so we stop there)
Notice how we see 8 twice in both factors of 72 and 32, this means that we use 8 as the main number we are going to multiply each of the 2 numbers in the brackets by. This is because it is the biggest common factor - this is what we have!
This is what we would have:
8(9-4)
BUT, that is not the answer!
Keep in mind we have the x squared too
But, 32 doesn’t have it?!!
It would be:
8(9x^2 - 4)
Do you get it??
Try to simplify it! Does it equal to 72x^2 - 32?
(And I am so very sorry for the long explanation, once you get the hang of it, it makes sense. Hope my explanation helped) :)
Help please and thank you
Answers
Answer:
2) C
3) D
4) D(5,-5) E(2,-7) F(4,-1) G(8,-8)
Step-by-step explanation:
The product of three integers is -40. What could the three integers be?
Answers
Answer:
You could choose -5, 2, 4
Select all equations that have graphs with the same y-intercept.
Select all that apply:
A) y = 3x - 8
B) y = 3x - 9
C) y = 3x + 8
D) y = 5x - 8
E) y = 2x - 8
F) y = (1/3)x - 8
Answers
Answer: A, C, D, E, and F have the same y-intercepts.
Step-by-step explanation:
The Equation for graph A has a y-intercept of -8
The Equation for graph B has a y=intercept of -9
The Equation for graph C has a y-intercept of -8
The Equation for graph D has a y-intercept of -8
The Equation for graph E has a y-intercept of -8
The Equation for graph F has a y-intercept of -8
The only difference between the y-intercepts of the equations is the equation for graph B, it has a y-intercept of -9 so it will not be the same as the other equations with the same y-intercepts. \
A, C, D, E, and F have the same y-intercepts.
Can you guys please help me I'm confused on this.
Answers
Answer:
5
Step-by-step explanation:
i dont know
give me the answers pls
Answers
Answer:
6 square cm
Step-by-step explanation:
b = 4 cm, H = 3 cm
AREA OF THE TRIANGLE
[tex]A = \frac{1}{2} bh \\ \\ = \frac{1}{2} \times 4 \times 3 \\ \\ = 2 \times 3 \\ \\ = 6 \: {cm}^{2} [/tex]
HEYY
NICKI MINAJ IS THE QUEEN OF RA-
Can you form a triangle with these given side lengths? 5 , 5 , 5
PLEASE HELP ME!!!
Answers
Answer:
Help...(no exuses)
Answers
Answer: 13 pints
Step-by-step explanation:
Hours worked versus salary.
Hours Worked Salary
0 0
10 $300
20 $600
30 $900
40 $1200
Function?
If so,
Domain =
Range =
c. Height versus age.
Height (cm) Age (years)
160 20
160 25
160 30
160 35
160 40
160 45
160 50
Function?
if so
Domain=
Range=
Answers
Answer: 3686 and 65 years
Step-by-step explanation:
complete the chart -9,3 sum ? product? difference? quotient? Please help!!
Answers
Step-by-step explanation:
9+3=12
9×3=27
9÷3=3 quotient is 0
find the difference. 14.3 - (-4.3)
Answers
Which number is in the solution set of the inequality x < 15?
A)
12
B)
18
C)
21
D)
24
Answers
Answer:
A) 12
Step-by-step explanation:
As 12 is less then 15..Simple:)
please help what answer
Answers
Answer:
I have attached pictures of me explaining how to solve it. Hope this helps and if you need help I am here. Thank you !!
I'm confused on this can you guys please help me. <:
Answers
Answer:
D. h
Step-by-step explanation:
Since the unknown is height, and height starts with the letter h, h would be most meaningful.
Answer: D. h
Answer:
x
Step-by-step explanation:
because you would have to say x which is the height of the flagpole minus 3
x-3
Martina is building a fence around her garden. For every 4 feet of fencing, the cost is $32.
Complete the table below showing the length of the fence and the cost.
Length of fencing (feet)
Answers
Answer:
For every foot of fencing, it costs $8. This should help us easily solve the question.
1st missing number: 48
2nd missing number: 56
3rd missing number: 9
4th missing number: 80
Answer:
Length of fencing: 4, 6, 7, 9, 10
Cost : 32 , 42, 63, 72, 90
Step-by-step explanation:
im not sure if the cost is correct but someone else might have the cost right
In which equation would you multiply both sides by 4.5 to get the variable alone?
A. 6.1p = 4.5
B. p ÷ 6.1 = 4.5
C. p ÷ 4.5 = 6.1
D. 4.5p = 6.1
Answers
Answer:
c.
Step-by-step explanation:
p/4.5 = 6.1
to isolate the variable do the opposite action
p/4.5 = 6.1
as p is divided by 4.5, you must multiply both sides by 4.5
p/4.5 ×4.5 = 6.1 × 4.5
p = 27.45
Please help, this is worth 15 points!
Answers
Its proportional, YW!!
Answer:
its proportional
Step-by-step explanation:
A mover is loading an elevator with many identical 48-pound boxes.
The mover weighs 185 pounds. The elevator can carry at most 2000 pounds.
Write an inequality that says that the mover will not overload the elevator on a particular ride.
a. Solve your inequality and explain what the solution means.
b. Graph the solution to your inequality on a number line.
Answers
Answer:
b
Step-by-step explanation:
a) After solving inequality , we get x ≤ 37.81 which meant number of boxes must be less than or equal to 38 approximately.
b) The graph is attached below.
What are inequalities ?
When two values are compared , an inequality represents whether one is greater than, less than, or not equal to the other.
It is given that the elevator can carry at most 2000 pounds of load. The weight of mover is 185 pounds. Also a mover is loading an elevator with many identical 48-pound boxes.
a)
Let's assume that the number of boxes is x.
Then the inequality can be written as :
48 × x + 185 ≤ 2000
Solving the inequality to get the value of x :
48x ≤ 2000 - 185
48x ≤ 1815
x ≤ 38 (approximate)
It meant
b) The graph for inequality which is 48 × x + 185 ≤ 2000 or say x ≤ 38 is shown below.
Therefore , the answers are :
a) After solving inequality we get x ≤ 37.81 which meant number of boxes must be less than or equal to 38 approximately.
b) The graph is attached below.
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What is x. pls help me
Answers
Complete the ratio table.
Answers
Answer:
Step-by-step explanation:
950 is for 10 15 is 1425 and 20 is 1900
Factorization of (
Answers
Answer:
2*2 is your answer.
Step-by-step explanation:
Can you please help!!!
Answers
Answer:
ok ok! i got you! =D
300+60 +8 = 368 so 300+60+8 matches with the first box
3,000+600+80 = 3,680 so 3,000+600+80 matches with the second box
30,000+600+80= 30,680 so 30,000+600+80 matches with the third box
that's it!
have a good day!
Please help me with these two problems!!! There due in a hour
Answers
what would the volume be for a cone that has a diameter of 16 and a height of 45
Answers
Answer:
3015.93 units^2
Step-by-step explanation:
Water is a very cohesive substance. This means that water particles
A.
are repelled by other types of particles.
B.
are repelled by other water particles.
C.
are attracted to other water particles.
D.
are attracted to other types of particles.
Answers
Answer:
C. The charges of the atoms that make up a water molecule makes them attracted to other water particles
The correct option is water particles are attracted to other water particles.
What is cohesive force?The term "cohesive forces" is a generic term for the collective intermolecular forces responsible for the bulk property of liquids resisting separation.
Specifically, these attractive forces exist between molecules of the same substance.
Given that, the water is a very cohesive substance.
We know that, the cohesive substance attracts the molecules of same kinds,
Cohesion means the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces because of their ability to form hydrogen bonds with one another.
Therefore,
The charges of the atoms that make up a water molecule makes them attracted to other water particles.
Hence, the correct option is water particles are attracted to other water particles.
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Select all transformations that maintain a shape's congruency.
A: a translation six units up
B: a reflection across the x-axis
C: a 180° rotation about the origin
D: a dilation with a scale factor of 2
E: a reflection across the y-axis and then a translation three units left
F: a translation two units down and then a dilation with a scale factor of less than 1
G: a reflection across the y-axis and then a dilation with a scale factor greater than 1
Answers
All transformations that maintain a shape's congruency are given below:-
A: a translation six units up
B: a reflection across the x-axis.
C: a 180° rotation about the origin.
E: a reflection across the y-axis and then a translation of three units left.
What is a translation?A figure is said to be translated in geometry when it is moved from one location to another without rotating, reflecting, or changing in size. To accomplish this, the figure's vertices are moved.
The following list contains each transformation that keeps a shape's congruency: -
A translation from the sixth unit up
A reflection on the x-axis is B.
a 180° rotation about the origin, denoted by C.
E: a reflection along the y-axis followed by a three-unit leftward translation.
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Evaluate the following expression if x=3: 2^x
Answers
2^3=8
2*2 equals 4 then 4*4 equals 8
Awnser is 8
