What is the first time the pendulum reaches 3.5 cm from the place it was released?
p(t)= -5cos(2pit)+5
how many seconds ?

Approximately after 2 seconds

Step-by-step explanation:

The height of the pendulum is modeled by the function:

When the pendulum reaches 3.5cm, then pP(t)=3.5 cm.

We substitute and solve for t.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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