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vazorg [7]
3 years ago
15

Convert this number expressed in standard form to scientific notation. 28,500,000 1. Move the decimal to create the coefficient:

   2.8500000 2. Write in scientific notation:          2.85 × 10x What is the value of x in the scientific notation?
Mathematics
2 answers:
Scilla [17]3 years ago
4 0
It is 10 to the power 7
astra-53 [7]3 years ago
4 0

Answer: The value of x is 7.

Step-by-step explanation:-

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as 5.0\times 10^3

As we are given that the value is 28,500,000

This number is written in scientific notation as : 2.85\times 10^{7}

Therefore, the value of x comes out to be 7.

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Brainest for best answer only 5 mins left show your work
Kamila [148]

Answer:

Step-by-step explanation:

Problem One

Perimeter is in meters not square meters. The equation is

2*(6.8+x) + 2*12.5= 47                Remove the brackets. Combine like terms  

13.6 + 2x + 25 = 47

38.6 + 2x = 47                            Subtract 38.5 from both sides

2x = 47 - 38.6  

2x = 8.4                                      Divide by 2

x = 4.2

Answer D

Problem 2

This problem is asking that you calculate the perimeter of a swimming pool.

The two semicircles on the ends make a whole circle.

The diameter of the semicircles is obtained from the difference of the two given lengths.

The rectangle has a length of 12. The length of the rectangle and the 2 semicircles is 16. The difference is 4. You could divide this by 2 to get the radius. I would just leave it as the diameter.

So the perimeter is pi*d + 2 * 12 [there are 2 lengths]

Perimeter = 4*pi + 24

Perimeter = 12.56 + 24

Perimeter = 36.56

Answer A

Problem 3

This is the circle inside the square.

The radius of the circle = 9

The diameter of the circle and the length of square's side = 2*9 = 18

The area of the square = s^2  where s = 18

The area of the square = 18^2 = 324

The area of the circle = pi * 9^2 = 3.24 * 81 = 251.34

The area of the Shaded area = 324 - 251.34 = 69.66

Answer C

Problem 4

b1 = 5

b2 = 11.5

h = 4.5

Formula

Area = (b1 + b2 ) * 4.5/2

Area =  (5 + 11.5) * 4.5 /2

Area = 16.5 * 4.5 / 2

Area = 74.25/2

Area = 37.125

Answer D

5 0
3 years ago
A rectangle has an area of 120 square feet and a width of 8 feet. please help
madam [21]

Answer:

Step-by-step explanation:

length = 120/8 = 15 feet

perimeter = (15 + 8) x 2 = 46 feet

5 0
2 years ago
What is the volume of the extra large tube
Fantom [35]

If by base of 10, you mean that the diameter of the base is 10, then the radius of the base is 5.

volume = pi * r^2 * h

volume = pi * 5^2 * 10

volume = 250pi, or approximately 785

6 0
2 years ago
Which shortcut proves these triangles are congruent?
vekshin1
The SAS or side angle side proves the triangle is congruent to each other
7 0
2 years ago
:
Gre4nikov [31]

Answer:

$6.75

Step-by-step explanation:

15% of 45 = $6.75

5 0
3 years ago
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