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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"Let It Go" is a song from Disney's 2013 animated feature film Frozen, whose music and lyrics were composed by husband-and-wife songwriting team Kristen Anderson-Lopez and Robert Lopez.
Culture and technology have allowed anatomically modern humans to adapt beyond our biological limits.
Culture is what makes us human, and different from animals. We have developed culture over a long period of time, and even though it changed throughout the ages, it is what defines us nevertheless. And obviously technology is advancing the society to an even greater extent.
