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maw [93]
3 years ago
5

Four bells at intervals of 12 minutes, 18 minutes, 20 and 25 minutes. If they toll together at 10 am, when next do they toll tog

ether again? ​
Mathematics
1 answer:
Pani-rosa [81]3 years ago
4 0

Answer:

1.00 am

Step-by-step explanation:

Find the LCM of 12,18,20 and 25

=900 min ....change it to hrs =15 hrs

10.00am___1000hrs

1000hrs+15hrs

=0100hrs

=1:00 am

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Two days after a biology experiment there was 49 million bacteria present. Four days after the experiment there was 600.25 milli
nataly862011 [7]

Answer:

y=Ae^(1.25t)

Step-by-step explanation:

From the expression  y=Ae^kt

After two days of the experiment, y = 49 million, t=2

After four days of the experiment, y= 600.25 million, t=4

A is the amount of bacteria present at time zero  and t is the time after the experiment (in days)

At t=2 and y =49

 49=Ae^2k…………….. (1)

At t=4 and y = 600.25

600.25=Ae^4k………… (2)

Divide equation (2) by equation (1)

600.25/49=(Ae^4k)/(Ae^2k )

12.25=e^2k

Take natural log of both sides

ln⁡(12.25) =2k

2.505⁡ =2k

k=1.25

The exponential equation that models this situation is y=Ae^(1.25t)

8 0
3 years ago
B) Find the value of 2^-3 x 3^-2
jekas [21]

Answer:

1/72

Step-by-step explanation:

2^-3 = 1/2^3 = 1/8

3^-2 = 1/3^2 = 1/9

1/8 x 1/9 = 1/72

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3 years ago
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Hello!

Ill make this quick. The Fire house is in the third quadrant.

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4 0
3 years ago
What is 29.75 yards in yards, feet, and inches?
mojhsa [17]

Answer:

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3 years ago
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3/4= 5/10= 4/9= 2/6= 2/8= 4/6=
mylen [45]
3/4=0.75
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3 years ago
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