Lacey, because you have to do the opposite when you want to get rid of a number. She subtracted 20 because it was originally positive 20. Chris messed up and did not do the opposite, subtraction, and instead he added 20
Answer:
a) True
<em> </em>
<em></em>
Step-by-step explanation:
<u><em>Step(i):-</em></u>
<em>Given that the definite integration</em>
<em> </em>
<em></em>
<em>we know that the trigonometric formula</em>
<em> sin²∝+cos²∝ = 1</em>
<em> cos²∝ = 1-sin²∝</em>
<u><em>step(ii):-</em></u>
<em>Now the integration</em>
<em> </em>
<em></em>
<em> = </em>
<em></em>
<em>Now, Integrating </em>
<em> </em>
<em></em>
<em> = sin π - sin 0</em>
<em> = 0-0</em>
<em> = 0</em>
<u><em>Final answer:-</em></u>
<em> </em>
<em></em>
<em></em>
<em></em>
Answer:
r=15.99
Step-by-step explanation:
r=C
2π=100.48
2·π≈15.99189
The answer to your problem is C the third picture