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Vladimir79 [104]
3 years ago
11

Which of the following fraction is equivalent to 0.45

Mathematics
2 answers:
Archy [21]3 years ago
6 0
0.45 is equal to 45/100.

Simplify: 45/5=9; 100/5=20

The answer is 9/20, which is the third choice.

Hope this helped☺☺

Zarrin [17]3 years ago
6 0
C, 9/20, is the answer because if you divide 9 by 20 you get .45. 
Also, 1/20 is equal to 0.05 and 9 x 0.05 is 0.45. 
Hope this helps!
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If ST=3x, TU=7x, and SU=10, what is ST?
iren2701 [21]


S--------T--------U

ST = T U

SU = 10

ST + TU = SU

3x + 7x = 10

10x = 10

x = 10/10

x = 1

So, what do you think happens next?

ST = 3x

Let x = 1

ST = 3(1)

ST = 3

I hope this helps.
3 0
3 years ago
The average thickness of books on a library shelf is 8.3 centimeters. The standard deviation is 0.6 centimeter. If 20% of the bo
jeka57 [31]

Answer:

8.8 cm

Step-by-step explanation:

-We know that the top 20% of the books are oversized.

-We therefore find the z-value of the top 20%:

z_{0.1}=8.4

#We substitute the z value in formula to solve X.

z=\frac{\bar  X-\mu}{\sigma}

Where

  • X is the minimum thickness of the book.

-Given \sigma=0.6 \ , \mu=8.3, the minimum thickness,X can be calculated as follows:

z=\frac{\bar  X-\mu}{\sigma}\\\\0.84=\frac{\bar X-8.3}{0.6}\\\\\bar X=0.84\times 0.6+8.3\\\\=8.804\approx 8.8\ cm

Hence, the minimum thickness of the oversized books is 8.8 cm

3 0
4 years ago
Eli is making guacamole. He uses 2 tablespoons of cilantro for every 3 avacados. At this rate, how many tablespoons of cilantro
weeeeeb [17]
Hello! So we can set this up as a ratio of 2:3. In other words, 2 tablespoons of cilantro for every 3 avocados. To find the amount of cilantro for 9 avocados, you have to think about basic multiplication. 3 * 3 = 9. So then, you should do the same thing to the other part. 2 * 3 = 6. Eli will need 6 tablespoons of cilantro for 9 avocados.
3 0
4 years ago
A 5'6" person walking down the street notices his shadow. If the angle of elevation from the tip of the shadow to the sun is 60°
madreJ [45]

Answer:

The length of the shadow is 3.17 feet .

Step-by-step explanation:

Given as :

The height of the person walking on street = H = 5'6''

∴ 12" = 1 '

So, 6" = \dfrac{1}{12} × 6 = 0.5'

I.e H = 5.5 feet

The angle of elevation of from tip of shadow to sun = Ф = 60°

Let The length of the shadow = X feet

<u>Now, From figure</u>'

Tan angle = \dfrac{\textrm perpendicular}{\textrm base}

Or, Tan Ф = \dfrac{\textrm AB}{\textrm AO}

Or, Tan 60° =  \dfrac{\textrm H}{\textrm X}

Or, Tan 60° =  \dfrac{\textrm 5.5 feet}{\textrm X}

Or, 1.732 = \dfrac{\textrm 5.5 feet}{\textrm X}

Or, X = \dfrac{\textrm 5.5 feet}{\textrm 1.732}

∴    X = 3.17 feet

So, The length of the shadow = X = 3.17 feet

Hence, The length of the shadow is 3.17 feet . Answer

3 0
3 years ago
In the function y=1/2x^2 , what effect does the number 1/2 have on the graph, as compared to the graph of the function y=x^2 ?
Masja [62]

Answer:

D isn't the correct answer. It's "It shrinks the graph vertically to 1/2 its original height."

Step-by-step explanation:

I'm not sure why though this is right because I graphed it, and I don't see how that could be the right answer.

8 0
3 years ago
Read 2 more answers
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