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3 years ago

11

Twenty students in class A an 20 students in class B were asked how many hours they took prepare for a exam

1 answer:

inn [45]3 years ago

7 0

What are you talking about

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What is the best approximation of the surface area of this right cone?

inn [45]

$\bf \textit{total surface area of a cone}\\\\
s=\pi r\sqrt{r^2+h^2}+\pi r^2\quad 
\begin{cases}
r=radius\\
h=height\\
-----\\
r=12\\
h=9
\end{cases}
\\\\\\
s=\pi (12)\sqrt{12^2+9^2}+\pi (12^2)\implies s=12\pi \sqrt{225}+144\pi 
\\\\\\
s=12\pi (15)+144\pi \implies s=180\pi +144\pi \implies s=324\pi$

8 0

3 years ago

If a building was placed at coordinates (-5,5), what would be the new coordinates if rotated 270° counterclockwise around the or

Brums [2.3K]

The rule for a 270° counterclockwise rotation is (x, y) ---> (y, -x).

So if you rotated (-5,5) 270° counterclockwise around the origin the new coordinates would be (-5,-5).

Hope this Helps!!

6 0

3 years ago

Read 2 more answers

9x + 8y3 – 7 = 3y3 -3<br> 9x+ 5y = 0

Vikki [24]

Answer:

102 actually just add it up

Step-by-step explanation:

add it up

5 0

3 years ago

What is quotient of a number 21

stira [4]

A quotient of a number 21 is 3 and 63
Hope this helps!

8 0

3 years ago

What 223 x 12 explain

geniusboy [140]

Answer: 2676

Step-by-step explanation:

223 x 12 = 2676

This is because 223 12 times equals 2676.

*I will attach my work for the problem so you can see the solving process more clearly :).

Hope this helps :).

4 0

2 years ago