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marishachu [46]
2 years ago
14

Can yall help me with this pls

Mathematics
1 answer:
Katyanochek1 [597]2 years ago
7 0
Its the third answer, how much gas he has after one hour
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A train travels 80 miles per hour. If its speed remains the same, how far will the train have gone in 90 minutes?
Nataly_w [17]
Hello! So, the train travels 80 miles in an hour. 90 minutes is equivalent ot 1 ½ hours. In case you don't know, ½ of 80 is 40. To find the distance gone in 90 minutes, we can just add 80 and 40. 80 + 40 is 120. Another way to solve it is to multiply 80 by 1.5 and you would still get the same answer. There. The train will have gone 120 miles in 90 minutes.
3 0
3 years ago
A scientist running an experiment starts with 100 bacteria cells. These bacteria double their population every 15 hours. Find ho
emmasim [6.3K]

Answer

It will take (t) = 24 hours to reach 300 .

Step by step explanation

It doubles every 15 hours.  initial bacteria = 100

We need to find how long it take for the bacteria cells to increase to 300.

300 = 100(2)^t/15

300/100 = 2^t/15

3 = 2^t/5

Taking "ln" both sides, we get

ln(3) = t/15 ln(2)

t/15 = ln(3)/ln(2)

t/15 = 1.585

t = 1.585 * 15

t = 23.78 hours

t = 24 hours to nearest whole hours.

Thank you.


6 0
3 years ago
I've tried everywhere to get this answerrrrr ill give brainliest for the correct answer mate!!
kodGreya [7K]

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Step-by-step explanation:

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A rhombus is constructed on side AD¯¯¯¯¯ of figure ABCD such that FA¯¯¯¯¯ lies on AB←→ as shown. If AD : AB = 2 : 5, what is the
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