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Sophie [7]
3 years ago
10

How do you write 21/30 as a percent? Please show how to do it :D

Mathematics
2 answers:
Helen [10]3 years ago
6 0
It would be 0.7 lol :)
AveGali [126]3 years ago
3 0

Answer:

70 %

Step-by-step explanation:

= 21/30 = 0.7

= 0.7 * 100

= 70%

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Which is the most efficient way to solve this equation? x+4=17
Ostrovityanka [42]

Answer:

x=13

Step-by-step explanation:

x+4 = 17

Subtract 4 from each side

x+4-4=17-4

x = 13

7 0
3 years ago
Which ordered pair does not represent
CaHeK987 [17]

Answer:

b

Step-by-step explanation:

you can use trial and error to solve this btw that's what I used and once I got to answer choice b, i plugged in the 2 numbers into the equation based of of their axis once i did that the equation now looked like this 9=3+3, when you solve this the equation would then look like this 9=6 and we both know that 9 doesn't not equal 6 so that is your answer.

7 0
3 years ago
A circle's radius that has an initial radius of 0 cm is increasing at a constant rate of 5 cm per second.
djyliett [7]

Answer:

a) r(t)=5t

b) A=\pi\cdot r^2

c) A=\pi\cdot (5t)^2

d) A=25\pi  t^2

Step-by-step explanation:

We know that the circle is increasing its radio from an initial state of r=0 cm, at a rate of 5 cm/s.

This can be expressed as:

r(0)=0\\\\dr/dt=5\\\\r(t)=r(0)+dr/dt\cdot t=0+5t\\\\r(t)=5t

a) Radius of the circle, r (in cm), in terms of the number of seconds, t since the circle started growing:

r(t)=5t

b) Area of the circle, A (in square cm), in terms of the circle's radius, r (in cm):

A=\pi\cdot r^2

c) Circle's area, A (in square cm), in terms of the number of seconds, t, since the circle started growing:

A=\pi\cdot r^2\\\\A=\pi\cdot (5t)^2

d) Expanded form for the area A:

A=\pi\cdot (5t)^2=25\pi\cdot t^2

3 0
3 years ago
A student in a surveying class measures an angle as 75°. What
olga55 [171]

Answer:

1.31

Step-by-step explanation:

\frac{5*3.14}{12} =\frac{15.7}{12} = 1.31

4 0
3 years ago
Read 2 more answers
Integrate (x^3)/(a^2)-(x^2) ?
notka56 [123]

Hi!

\frac{x^3}{(a^2)-(x^2)}

<em>First remove parenthesis.</em>

\frac{x^3}{a^2-x^2}

<em>Factor a^2-x^2 or (x+a)(a-x)</em>

=\frac{x^3}{(a+x)(a-x)}

Hope this helps! Thank you for posting your question at here on Brainly. Have a great day.

-Charlie

5 0
3 years ago
Read 2 more answers
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