linreaburg

29.01.2020 • 

Mathematics

Hannah does an experiment. she has two colorless chemicals that she mixes together in a beaker. which of the following indicates that a chemical change occurs when she mixes the two chemicals together?
i. the chemicals change color from colorless to purple.
ii. a yellow gas forms.
iii. a brown solid forms in the bottom of the beaker.
iv. the temperature of the chemicals rises 15°c.
a.
ii and iii only
b.
i and iii only
c.
i, ii, iii, and iv
d.
i, ii, and iii only

Ответ:

abrown6758

13.07.2020

Mathematics

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Slope of path at time t = 4 is y '(4)/x '(4) = (-15cos(4) + 4cos(4) - 1 + sin(4))/(6 - 2sin(4))

When horizontal position is 60:

2 + 6t + 2cos(t) = 60

Step-by-step explanation:

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