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horrorfan [7]
2 years ago
9

1. Gina has a circular gold bracelet with a diameter of 3 inches. She wants

Mathematics
1 answer:
Tom [10]2 years ago
4 0
C=2pier
C= 2 • 3.14 • 1.5 (radius if 1/2 of diameter)
C= 9.42

Hope that helps!
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Find the length of the curve. R(t) = 7t, 3 cos(t), 3 sin(t) , −2 ≤ t ≤ 2
Leviafan [203]

we are given

r(t)=(7t,3cos(t),3sin(t))

we can find x , y and z

x=7t,y=3cos(t),z=3sin(t))

now, we can use arc length formula

L=\int\limits^a_b {\sqrt{(x')^2+(y')^2+(z')^2} } \, dt

now, we can find derivative

x'=7,y'=-3sin(t),z'=3cos(t))

now, we can plug values

and we get

L=\int _{-2}^2\sqrt{7^2+\left(-3\sin \left(t\right)\right)^2+\left(3\cos \left(t\right)\right)^2}dt

L=\int _{-2}^2\sqrt{7^2+9}dt

=\sqrt{58}\cdot \:2-\left(-2\sqrt{58}\right)

L=4\sqrt{58}...........Answer


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3 years ago
What is the volume of the rectangular prism?
Dovator [93]

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3 years ago
grace scored 17 ot of 20 on her reading quiz and 20 out of 25 on her science quiz. on which quiz did grace score a higher percen
almond37 [142]
Her reading quiz, because in order to find a percent dive 17 by 20 (or 20 by 25) and multiply the answer by 100.
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Answer:

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d. empty or null set is the answer

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