2 years ago

there are 24 hours in a day scientists tell us that we should sleep for 3/8 of a day how much time should we spend sleeping

1 answer:

jeka942 years ago

8 0

When you have to find the part of a number, remember that you have to multiply the two numbers (fraction and whole number)

In a day there are 24 hours.
3/8 of a day
Process:
24 X 3/8 = 9
We sleep 9 hours of the day.

Bascially you go 3/8 = .375 Then multiply .375 x 24 = 9

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What are the zeros of (x-2)(x^2-9)

WARRIOR [948]

$(x-2)(x^2-9)=0\iff x-2=0\ or\ x^2-9=0\\\\x-2=0\ \ \ \ |add\ 2\ to\ both\ sides\\\\\boxed{x=2}\\\\x^2-9=0\ \ \ \ |add\ 9\ to\ both\ sides\\\\x^2=9\iff x=\pm\sqrt9\to \boxed{x=-3\ or\ x=3}\\\\Answer:\boxed{x=-3\ or\ x=2\ or\ x=3}$