John will need to sleep for 10.3 hours before his second exam so that the
average of his two exam scores is an 80.
We were given
8 hours of sleep = 70
To get average of 80
<u>70+ x</u> = 80
2
Cross multiply:
70+x = 160
x= 160-70
= 90.
If 8 hours of sleep = 70
x hours of sleep = 90
Cross multiply
8× 90 = 70 × x
720 = 70x
x = 720/70
x = 10.2857
≈ 10.3 hours of sleep
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Answer:
3 times
Explanation:
When the dough is folded, it increases by a constant factor. We can model the growth of the thickness using the exponential growth model

Where:
Initial thickness,
= 2mm
Growth factor, r =8%=0.08
We want to find the smallest number of times Soon Yi will have to roll and fold the dough so that the resulting dough is at least 2.5mm.
i.e When 

Therefore, the smallest number of times Soon Yi will have to roll and fold the dough so that the resulting dough is at least 2.5mm thick is 3.
Ledger balance indicates whether right amounts were posted to the correct general ledger accounts
The statement 'nonstandard forms of English can be as effective as the standard form of English' can be extracted in the excerpt from "Mother Tongue".
<h3>What is a mother tongue?</h3>
A mother tongue refers to a special language spoken by society and adopted as its own by its habitants.
There are many countries around the world that adopted English as their mother tongue and expressions in such countries may be certainly effective.
Mother tongue makes also reference to the language which an individual speaks from his/her childhood.
Learn more about the “Mother Tongue” excerpt here:
brainly.com/question/10046495