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kvasek [131]
3 years ago
12

21 is 84% of what number?

Mathematics
2 answers:
Radda [10]3 years ago
7 0
21 is 84% of 25

Convert the percentage (84) into a decimal by dividing it over 100:
\frac{84}{100} = 0.84

Divide 21 over 0.84:
\frac{21}{0.84} = 25
cestrela7 [59]3 years ago
6 0
21 = 84% * x

21 = 84/100 * x

21 = 42/50 * x

21 = 21/25 * x

x = 21 * 25/21

x = 25


<span>21 is 84% of </span>25<span>.</span>
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Write 3.63 x 10^-5 in standard notation.
Rudik [331]

Answer:

3.63E-5

Step-by-step explanation:

Convert 3.63 x 10^-5 from a scientific calculator

We do this by raising 10^n power * whole number entered where n=-5

3.63 x 10^-5 converted to a number = 3.63 x 1.0E-5

3.63 x 1.0E-5 converted to a number = 3.63E-5

5 0
3 years ago
In a school, only 13 out of 15 student participate in a competition.what is the probability of the student who do not makes it t
Papessa [141]

Answer:

\frac{2}{15}

Step-by-step explanation:

Number of students participating in the competition = 13.

Total number of students in the school = 15.

Thus ,

the number of students who did not make to this competition =

Total number of students - number of students participated

= 15-13 = 2.

Now ,

probability of the student who do not makes it to the competition

= fraction of students who did not make to this competition from the total number of students .

=\frac{2}{15}.

4 0
3 years ago
TAKE ANY UNMARKED BOWL OR GLASS AND FILL IT EXACTLY 3/5 FULL WITH WATER.
Wittaler [7]

Answer:

Take a glass, and fill it completely with water.

Now, pour that water in a marked bowl and measure how much water is in the bowl, that amount of water will be 100% of the total water that the glass can have.

Now you need to pour 3/5 of the water back in the glass, it is easier for water until the water in the bowl is exactly 2/5 of the initial amount.

You can do this as follows.

2/5 = 0.4 or 40% in percentage form.

Then if the amount of water in the marked bowl is A, the amount of water that must remain in the marked bowl is A*0.4

Then drop the water in the glass until the water in the marked bowl is the quantity that you found previously.

In this way, you can be sure that the glass is 3/5 full of water.

8 0
3 years ago
I will mark brainliest to whoever helps! :D
Arte-miy333 [17]

Answer:

-7/2y

Step-by-step explanation:

cancel out the Z's than youre left with -7/2y :}

8 0
3 years ago
After 8 hours of snow, the
Dmitrij [34]
Answer: -21.125 or -21 1/8 degrees

Explanation: Divide the number of degrees (-169) by the amount of time it was snowing (8) to get the answer (-21.125).

-169÷8=-21.125
4 0
3 years ago
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