3 years ago

Calculate the surface area of a hockey puck with a height of 1 in. and a diameter of 3 in

Mathematics

1 answer:

uysha [10]3 years ago

6 0

Answer:

23.56

Step-by-step explanation:

2( $\pi r^{2}$ ) + 2 $\pi$ rh

2( $\pi$ $1.5^{2}$ )+ 2 $\pi$ (1.5)(1)

23.56

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Divide.<br> a.1 − 2i/2i<br> b. 5 − 2i/5 + 2i<br> c.√3 − 2i/−2 − √3i

Umnica [9.8K]

Answer:

(a) \frac{-1i}{2}-1[/tex]

(b) $\frac{20i+21}{29}$

Step-by-step explanation:

We have to perform division

(a) $\frac{1-2i}{2i}$

So after division

$\frac{1-2i}{2i}=\frac{1}{2i}-\frac{2i}{2i}=\frac{-1i}{2}-1$

(b) We have given expression $\frac{5-2i}{5+2i}$

After rationalizing $\frac{5-2i}{5+2i}\times \frac{5-2i}{5-2i}=\frac{(5-2i)^2}{25+4}=\frac{25+4i^2+20i}{29}=\frac{20i+21}{29}$

After rationalizing

$\frac{\sqrt{3}-2i}{-2-\sqrt{3i}}\times \frac{-2+\sqrt{3i}}{-2+\sqrt{3i}}=\frac{-2\sqrt{3}+7i+2\sqrt{3}}{7}=\frac{7i}{7}=i$

5 0

3 years ago

Help pls ..........<br>

Wittaler [7]

Answer:

112

Step-by-step explanation:

8 0

2 years ago

Factor 24j-16 to identify the equivalent expressions. Its multiple choice. A=8(3j−2) B=6(4j−2j) C=4(6j−4) D2(12−8)

Ivan

Answer:

I would say either A or C

Step-by-step explanation:

because when you distribute both they both come out to be 24j - 16

6 0

3 years ago

Anyone mind helping me out ?

Firdavs [7]

Answer:

18/3

Step-by-step explanation:

6x3=18

8 0

3 years ago

6. The angle relationship shown is-

expeople1 [14]

Answer:

60+30=90 degrees = complementary angles.

Step-by-step explanation:

4 0

2 years ago