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gavmur [86]
3 years ago
11

0.0021 in scientific notation

Mathematics
1 answer:
White raven [17]3 years ago
8 0

Answer:

2.1 * 10 to the -3

Step-by-step explanation:

0.0021* 10000/10000

21/10000

2.1/1000

2.1/10 to the 3

2.1*10 to the -3

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HELP ME PLEASE PLEASE PLEASE
scoray [572]

If the angles of a convex octagon are 2x+6,x+13,2x-1,2x+12,2x-17,3x-4,3x-10,4x. then the smallest angle is 21°.

Given The exterior angles of convex octagon are 2x+6,x+13,2x-1,2x+12,2x-17,3x-4,3x-10,4x.

and we have to find the value of smallest angle.

The sum of the  angles of a convex octagon is 360°

so to calculate the smallest angle we need to find out the value of x first and which is calculated by summing up all the exterior angles and put them equal to 360.

(2x+6)+(x+13)+(2x-1)+(2x+12)+(2x-17)+(3x-4)+(3x-10)+4x=360

2x+6+x+13+2x-1+2x+12+2x-17+3x-4+3x-10+4x=360

2x+x+2x+2x+2x+3x+3x+4x+6+13-1+12-17-4-10=360

19x-1=360

19x=360+1

19x=361

x=361/19

x=19

Putting the value of x in all the angles and we will find the following:

2x+6=2*19+6=44

x+13=19+13=32

2x-1=2*19-1=37

2x+12=2*19+12=50

2x-17=2*19-17=21

3x-4=3*19-4=51

3x-10=3*19-10=47

4x=4*19=76

Hence among all the exterior angles the smallest angle is 21°.

Learn more about angles at brainly.com/question/25716982

#SPJ10

8 0
2 years ago
At a high school , 51 students participated in football or tutoring,34 participated in football , and 7 participated in football
Blababa [14]
(34 + 7) - 51 = 10 students that participated in tutoring.
8 0
3 years ago
Read 2 more answers
Hellpppp pleasseeeeee hurryyyyyy
jeka94

Answer:

b

Step-by-step explanation:

you should put these into a demos graphing calculator

4 0
4 years ago
Find the dimensions of the rectangle of largest area that has its base on the x-axis and its other two vertices above the x-axis
stealth61 [152]

Complete question is;

Find the dimensions of the rectangle of largest area that has its base on the x-axis and its other two vertices above the x-axis and lying on the parabola. (Round your answers to the nearest hundredth.) y = 6 - x²

Answer:

height = 4 and base = 2√2

Step-by-step explanation:

Area of a rectangle is given by;

A = base(b) × height(h)

To start off, we will first have to consider half of the rectangle.

Due to the fact that it is bounded by a parabola which is symmetric over the y-axis, it means that the rectangle will have the same area on the right and left hand sides.

So if we maximize the area of the first quadrant, it means that we are also maximizing the area of the entire rectangle.

Now, since we are dealing with the base and other 2 vertices on the x-axis, it means that the base(b) of this half rectangle will be x.

The height of this rectangle is the y coordinate of the corner that is directly above the x coordinate, which is also on the rectangle.

Therefore, the coordinates of the upper corner will be (x, y), or (x, 6 - x²). Thus our half base is x and full height is 6 - x². Area will be;

A = x(6 - x²)

A = 6x - x³

We will maximize this area by finding the derivative and equating to zero.

Thus;

A' = 6 - 3x²

At A' = 0,we have;

6 - 3x² = 0

3x² = 6

x² = 6/3

x² = 2

x = √2

Thus, from y = 6 - x², we have;

y = 6 - (√2)²

y = 6 - 2

y = 4

Since x is half base, it means our full width is 2x = 2 × √2 = 2√2

So, height = 4 and base = 2√2

8 0
3 years ago
Charlie sold a solid car for $7800. If he earned 12% of the selling price as a profit, how much profit did Charlie earn?
galina1969 [7]
$936 dollars is the profit
4 0
3 years ago
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