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Arisa [49]
3 years ago
7

Estimate 58% of 121 by using 10%

Mathematics
2 answers:
Basile [38]3 years ago
7 0
58% is about equal to 60%, or 6 times 10%. 10% of 121 is 12.1.
12.1 * 6 = 72.6
To take this further, 58% is 2% less than 60%, or 2 times 1%. 1% of 121 is 1.21.
72.6  - (1.21 * 2) = 72.6 - 2.42 = 70.18
dsp733 years ago
3 0

Answer:

58% of 121 by using 10% is 70.18.

Step-by-step explanation:

Given : 58% of 121.

To find  : estimate 58% of 121 by using 10%.

Solution : We have given  58%

Estimate of  58% is 60%

We need to use 10%

We can write 60%  as 6 times of 10%

Since , 10% of 121

10*\frac{121}{100} =  12.1

60%  =  6 times of 10%

Plugging the values

60%  == 6 times of 12.1

6 *12.1 = 72 .6

To take this further, 58% is 2% less than 60%, or 2 times 1%. 1% of 121 is 1.21.

72.6  - (1.21 * 2) = 72.6 - 2.42 = 70.18

Therefore,  58% of 121 by using 10% is 70.18.

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Natasha2012 [34]
Hi!

So it starts with 1.50. 

1.50 +

0.50 for each mile

1.50 + 0.50x

She has $25 to spend, so the amount has to be less than or equal to $25.

1.50 + 0.50x ≤ 25
^the answer

Hope this helps! :)

5 0
3 years ago
the difference between your school and house is 5 kilometers. on foot you get home in 25 minutes. if you rode your bike you can
Artyom0805 [142]

The speed while walking is 0.2 kilometers per minute

Step-by-step explanation:

The speed is calculated as distance per unit time.

Given

Distance = d = 5 km

Time by walking = t = 25 minutes

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s = \frac{d}{t}

Putting the values

s = \frac{5}{25}\\s= 0.2\ km/min

The speed while walking is 0.2 kilometers per minute

Keywords: Speed, distance

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7 0
3 years ago
How do you know that 50 is not a perfect square?
Alexus [3.1K]
We can always do a prime factoring of it, and check

50 = 2*5*5
        2*5²

a perfect square, so-called, is the resulting number of a squared value, well 50 is not the result of anything squared, is the result of 3 factors, in this case 2,5 and 5.

a perfect square will be something like say 64, or 144, because

64 = 8*8
        8²

144 = 12*12
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6 0
3 years ago
It took 20,000 workers to build the Taj Mahal in 20 years. How many workers would be required to build it in 10 years?
omeli [17]

Answer:

40,000 workers

Step-by-step explanation:

This question deals with simple rates proportion.

If it takes 20 years for X workers to complete a job,

if we double the amount of workers, we will take half the time.

hence to halve the time from 20 years to 10 years, we will need to double the amount of workers.

In this case we will need 20,000 workers x 2 = 40,000 workers

4 0
3 years ago
Read 2 more answers
How many times smaller is 2 × 10-3 than 4 × 10-2? PLEASE HELP
NNADVOKAT [17]
<h2>The required "option A) 20" is correct.</h2>

Step-by-step explanation:

Let x be the smaller than 4 ×10^{-2}.

To find, the number of times smaller is 2 × 10^{-3} than 4 × 10^{-2} = ?

∴ x = \dfrac{4\times 10^{-2}}{2\times 10^{-3}}

= 2 × 10^{-2} × 10^{3}

Using the identity,

a^{m}=\dfrac{1}{a^{-m}}

= 2 × 10^{-2+3}

Using the identity,

a^{m} \timesa^{n}=a^{m+n}

= 2 × 10^{1}

= 2 × 10

= 20

Thus, the required "option A) 20" is correct.

6 0
3 years ago
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