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Anvisha [2.4K]
2 years ago
6

Which number is the smallest? 4.4 ⋅ 10−5, 3.99 ⋅ 10−6, 2.6 ⋅ 102, 1.85 ⋅ 103

Mathematics
2 answers:
harina [27]2 years ago
7 0
The answer is:  [B]:  " 3.99 * 10⁻⁶ " .
______________________________________________
  Note:
______________________________________________
We are given the following answer choices, and we are asked which one is the "smallest number" :
_______________________________________________
  [A]:  4.4 * 10⁻⁵
_________________________________________
  [B]:  3.99 ⋅ 10⁻⁶
______________________
  [C]:  2.6 ⋅ 10²
______________________
  [D]:  1.85 ⋅ 10³
_______________________
         We can rule out answer choices: [C] and [D]; since these values, essentially "direct us" to move the decimal point FORWARD "2 places" and "3 places", respectively;  whereas choices [A] and [B] essentially "direct us" to move the decimal point BACKWARD "5 places" and "6 places" respectively.  Note that all values given in the answer choices are written in proper "scientific notation" —that is, beginning with a "single integer followed by (a) decimal point(s) and then additional digits (when needed).  So, the answer choice that essentially "directs us" to move the decimal point BACKWARD "6 places" —
___________________________________________________
             →   Answer choice:  [B]:  " 3.99 * 10⁻⁶ "  ;
______________________________________________
                  is the smallest value ; and as such, the correct answer.
________________________________________________________
Assoli18 [71]2 years ago
6 0

                   Answer:

<u>Answer choice: B</u>:  " 3.99 * 10⁻⁶

                  Explanation:

  <u>I got it right so don't worry :)</u>

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78 - 2 4 ÷ ( 14 – 6) × 2 =
Lera25 [3.4K]

Answer:

74

Step-by-step explanation:

you first simplify 2/1  and then 78- (2*2)

6 0
2 years ago
If the mean of 25, 28, a, 30 and 32 is 27, then find the value of a.
Anna11 [10]

Answer:

a = 20

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count}

          = \frac{25+28+a+30+32}{5}  = \frac{115+a}{5}

Then

\frac{115+a}{5} = 27 ( multiply both sides by 5 to clear the fraction )

115 + a = 135 ( subtract 115 from both sides )

a = 20

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3 years ago
In the past month, Kaitlin rented 1 video game and 4 DVDs. The rental price for the video game was $2.40 The rental price for ea
vichka [17]

Answer:

$2.40 for the video game and $14.8 for the DVDs

Step-by-step explanation:

1 video game = $2.40

4 DVDs = $14.8

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6 0
3 years ago
A wave has frequency of 10 Hz and a speed of 30 m/s. What is the wavelength of the<br>wave?​
ladessa [460]

Answer:

3

Step-by-step explanation:

Wavelength is usually denoted as letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f. Waves of different wavelengths.

formula: λ = v/f

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8 0
3 years ago
Given the following diagram, find the required measure.
Zielflug [23.3K]

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∠ 5 = 40°

3 0
3 years ago
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