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denpristay [2]
3 years ago
7

Help me please,Thanks

Mathematics
1 answer:
maxonik [38]3 years ago
6 0
<span>Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation?</span>
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SOMEONE PLEASE HELP ME FINAL TEST
stealth61 [152]

Answer:

C

Step-by-step explanation:

Go up the y axis and find the number six, look to the left and find where the x axis connects and then look to the right and do the same.

3 0
3 years ago
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How wide is a poster that has a length of 9/2 feet and area of 45/4 square feet?
Vinil7 [7]
Area = length × width
45/4 = 9/2 × width
width = (45/4) ÷ (9/2)
= 5/2 feet
8 0
3 years ago
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Calculate the mass of sodium azide (2NaN3) required to decompose and produce 1.20 moles of nitrogen.
Ad libitum [116K]

Answer:

The answer to your question is:  40.8 g of NaN₃

Step-by-step explanation:

NaN₃ mass = ?

nitrogen = 1.2 moles

Equation

                           2NaN₃      ⇒ 2Na  +  3N2

                          2 moles of NaN₃  -----------------   3 moles of N₂

                           x                          ------------------   1.2 moles of N₂

                          x = (1.2 x 2) / 3

                          x = 2.4/ 3

                         x = 0.8 moles of NaN₃

MW NaN₃ = 23 + 28

                = 51 g

                         51 g of NaN₃ ----------------- 1 mol

                         x                    ----------------- 0.8 mol

                         x = (0.8 x 51) / 1

                        x = 40.8 g of NaN₃

3 0
3 years ago
Describe a transformation that would make quadrilateral ABCD into a square
Harlamova29_29 [7]

Answer:

ok, relax and listen I’ve got this ok?

Step-by-step explanation:

You just move it up 4 squares to (2, 9), (10,9)

see?you got this I believe in you!!!

5 0
3 years ago
How much is the percent increase from 1 to 4?
svetlana [45]

Answer:

300%

Step-by-step explanation:

3 difference increase

5 0
2 years ago
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