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vova2212 [387]
4 years ago
12

please explain why the measurement of a mass of an object in milligrams to two decimal places is precise

Mathematics
1 answer:
Serga [27]4 years ago
4 0
Milli is a thousand grams, two decimal places is the thousandths place
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While in orbit, a space shuttle travels at a speed of 28,200 kilometers per hour. What is the total number of kilometers travele
kogti [31]

Answer:

The distance is 676,800 kilometers, which in scientific notation has a value of 6.748*10⁵ kilometers.

Step-by-step explanation:

A space shuttle travels at a speed of 28,200 kilometers per hour. Given that in 1 day there are 24 hours, it is possible to apply the following rule of three: if in 1 hour the space shuttle travels 28,200 kilometers, in 24 hours how much distance will the space shuttle travel?

distance=\frac{24 hours*28,200 kilometers}{1 hour}

distance= 676,800 kilometers

Scientific notation is a quick way to represent a number using powers of base ten. This notation is used to be able to express very large or very small numbers very easily.

The numbers are written as a product:

a*10ⁿ

where:

  • a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
  • n is a whole number, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always a whole number, positive if it is shifted to the left, negative if it is shifted to the right.

To write the number 676,800 in scientific notation, perform the following steps:

The decimal point is moved to the left as many spaces until it reaches the right of the first digit.  This number is then written, which will be the coefficient a in the expression of the previous product.  In this case a=6.76800= 6.748

The base 10 is written with the exponent equal to the number of spaces that the comma moves. This is a positive number because the comma is shifted to the left. In this case n= 5

Then, <u><em>the distance is 676,800 kilometers, which in scientific notation has a value of 6.748*10⁵ kilometers.</em></u>

5 0
3 years ago
Two sides of a parallelogram are in the ratio 5:4. If the perimeter is 54cm , the length of the larger side is -
Ainat [17]

Answer:

15 cm

Step-by-step explanation:

If we have two sides of a parallelogram in the ratio 5:4, then the other two sides must also be in the same ratio.

If the perimeter is 54, we can create the following equation regarding the length of each side

5x+4x+5x+4x=54\\\\18x=54\\\\x=3

As our value for x is 3, and we know that the value for the larger side is 5x, we can simply plug in x to get the length of the larger side

5x\\\\5(3)\\\\15

3 0
3 years ago
Find the value of the variables in the figure below
svetlana [45]

Answer:

The answer to your question is:

x = 21

y = 4

∡ = 75° and 105°

Step-by-step explanation:

Process

            3(x + y)° + 5x = 180                  supplementary angles

            3(x + y) = 4x - 9                        corresponding angles

Expanding

           3x + 3y + 5x = 180       (1)           Like terms

           3x + 3y = 4x - 9            (2)        

          8x + 3 y = 180         (1)

    8   (   -x  + 3 y = -9)       (2)           Multiply by 8

       8x  + 3y = 180       (1)

      -8x +24y = -72        (2)                    Elimitation method

               27 y = 108

                  y = 108 / 27

                  y = 4        

         8x + 3 (4) = 180

         8x +12 = 180

               8x    =  168

              x = 21

             

3(21 + 4) = 3(25) = 75°

5(21) = 105°

       

               

6 0
3 years ago
How would I graph these equations?<br><br> a. 2x + 3y = 12<br><br> b. x = 7
riadik2000 [5.3K]
These are 2 very different equations, and should be graphed very differently.

<u>A
</u>
<u /><u />For Part A, we must first put this in Slope Intercept Form (SIF), which is y=mx+b where "m" is the slope and "b" is the y-intercept. To do this, we should solve like a normal equation for y.

 2x+3y=12
-2x       -2x
 3y=-2x+12
 /3        /3
y=-2/3x+4

Now that we have the proper equation, it is simply to graph! We should simply make a point at (0, 4), and then go down 2, right 3 until you are satisfied with your line.

<u>B
</u>
Part B is a simple x value, which means you will draw a vertical line through 7 on the x-axis.

Below I have attached a clearly labeled graph that shows you examples of these lines. The red markings indicate x=7. The yellow circle shows you the y-intercept in Part A, while the yellow dots show you the slope in Part A.

3 0
4 years ago
Alexander and his children went into a grocery store and he bought $6 worth of bananas and peaches. Each banana costs $0.60 and
bonufazy [111]

Answer:

he bought 5 peaches 2 bananas

Step-by-step explanation:

7 0
3 years ago
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