Can you explain your question?
Okay I am going to explain to you and show you how to get the correct answer.
Fist you need to find the Greatest common factor which is 45 because 5×9=45
8/9=40/45
+3/5=27/45
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67/45 is reduced to 1 22/45
5 goes into 45 9 times so 3 times 7 equals 27 and 9 goes into 45 5 times so 8 times 5 equals 40 you add both numbers up and get 67. 67 can't go into 45 so you subtract 67 from 45. 45 goes into 67 1 time so that is your whole the number. 22 is left over so that is your numerator. The denominator remains the same.
Ahh... this is pretty easy!!
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Locomotive is 40 feet.
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Model is 16.
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So?
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Divide 40 by 16!!
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What's that?
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2.5.
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So your answer choice is 2.5
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Hope I helped!!
Answer:
The substance decays by 7.5% every year
Step-by-step explanation:
4 is the nearest integer
as a decimal this number would be 3.5, which would round up to 4.