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stiks02 [169]
3 years ago
11

The period of a pendulum is the time the pendulum takes to swing back and forth one full time. The function I = 0.81t^2 relates

the length l in feet of a pendulum to the time t in seconds that it takes to swing back and forth. The convention center in Portland, Oregon, has the longest pendulum in the U.S. The pendulum’s length is 90 ft. Find the period for this pendulum.
a. 8.5 seconds
b. 10.5 seconds
c. 90 seconds
d. 111 seconds
Mathematics
1 answer:
kogti [31]3 years ago
5 0

Answer:

b.  t = 10.5 seconds.

Step-by-step explanation:

l = 0.81t^2

90 = 0.81t^2

t^2 = 90 / 0.81

t^2 = 111

t = 10.5 seconds.

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ivanzaharov [21]

Answer:

\frac{16}{81}

Step-by-step explanation:

Just Square the numbers like a normal equation.

4² = 16

9² = 81

This gives us \frac{16}{81}

or 0.198 as a decimal (approx)

6 0
3 years ago
Read 2 more answers
How do you solve a-9/a3
Klio2033 [76]
Is it this?
\frac{a - 9}{a3}
If so, then
\frac{a - 9}{a3}  = 0 \\  \frac{a}{a3}  -  \frac{9}{a3}  = 0 \\  \frac{1}{3}   -  \frac{9}{a3}  \\  \frac{1}{3}  =  \frac{9}{a3}  \\ 3( \frac{1}{3} ) = 3( \frac{9}{a3} ) \\ 1 =  \frac{9}{a}  \\ a = 9
5 0
3 years ago
Mason and Laney run laps. The ratio of the number of laps Mason ran to the number Laney ran was 2:3.
3241004551 [841]

Using proportions, it is found that Mason ran 620 meters.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

Considering the ratio, the <em>rule of three</em> is given as follows:

2 laps for Mason - 3 laps for Laney.

n meters for Mason - 930 meters for Mason.

Applying cross multiplication:

3n = 930 x 2

n = 930 x 2/3

n = 620

Mason ran 620 meters.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

3 0
2 years ago
A fair spinner A is spun 7 times. What is the probability of getting “Green” at least 5 times if there are 8 colors separated eq
sasho [114]

Answer:

6\frac{2}{3}

Step-by-step explanation:

OK, so basically I'm pretty sure that you add all of them together and put it as a fraction over 3 so basically  \frac{20}{3} then simplify it into 6\frac{2}{3}

8 0
2 years ago
Create<br> height<br> question about<br> Grade 7
frez [133]

Answer:

wdym like create a question about height that includes 'Grade 7' in it?

Step-by-step explanation:

4 0
3 years ago
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