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riadik2000 [5.3K]
2 years ago
12

30. One of the games at a carnival involves trying to ring a bell with a ball by hitting a lever that propels the ball into the

air. The height of the ball is modeled by the equation h(t) = -16t2 + 39t. What is the real world or practical domain of this function?
Mathematics
1 answer:
Setler [38]2 years ago
3 0
This model will be by 16/8 I will do 8/8
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Find the fifth roots of 243(cos 260° + i sin 260°)
Charra [1.4K]
<span>use De Moivre's Theorem:

⁵√[243(cos 260° + i sin 260°)] = [243(cos 260° + i sin 260°)]^(1/5)

= 243^(1/5) (cos (260 / 5)° + i sin (260 / 5)°)

= 3 (cos 52° + i sin 52°)

z1 = 3 (cos 52° + i sin 52°) ←← so that's the first root


there are 5 roots so the angle between each root is 360/5 = 72°

then the other four roots are:

z2 = 3 (cos (52 + 72)° + i sin (52+ 72)°) = 3 (cos 124° + i sin 124°)

z3 = 3 (cos (124 + 72)° + i sin (124 + 72)°) = 3 (cos 196° + i sin 196°)

z4 = 3 (cos (196 + 72)² + i sin (196 + 72)°) = 3 (cos 268° + i sin 268°)

z5 = 3 (cos (268 + 72)° + i sin (268 + 72)°) = 3 (cos 340° + i sin 340°) </span>
3 0
3 years ago
Plz help it's due today ​
dybincka [34]

Answer:

tanG= 15/20 = 3/4

tanX= 8/15

Step-by-step explanation:

tan is always opposite over adjacent

6 0
3 years ago
Read 2 more answers
Mr. McGee mowed 4/5 of his lawn. His three sons finished the mowing. Each son mowed the same amount. How much of the lawn did ea
liubo4ka [24]

Answer:

1 fifteenth, or 1/15

Step-by-step explanation:

If there are 3 sons multiply the fraction by 3 and then you have 12/15 because 12/15 is equal to 4/5, so the remaining is 3 out of 15, so divide that between the 3 sons and boom, 1/15th per son.  

5 0
3 years ago
If mom has 8 apples and dad has 5 apples how many apples do that have in all
LenKa [72]

Answer:

8 + 5 = 13 apples

Step-by-step explanation:

The words "in all" mean addition. Therefore, 8 apples plus 5 apples equals 13 apples.

4 0
2 years ago
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Can any one tell me how to do this problem?
Vika [28.1K]
(1/2)/2=3/x
we can cross multiply, aka multiply both sides by 2x
(1/2)x=2*3
(1/2)x=6
times 2/1 both sides
x=12
5 0
2 years ago
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