<span><span>6.93 = <span>693/100
</span></span><span>
Divide: 7 / 6.93 = <span>71</span> · <span>100693</span> = <span>7 · 1001 · 693</span> = <span>700693</span> = <span>10099
</span>
To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.</span></span>
Answer:
8000 gallons/household per month
Step-by-step explanation:
Given that the discharge of 4.8 trillion gallons could supply country A households in 6 months, find for a single month.
Divide the discharge (4.8 trillion gallons) by 6
4.8/6 =0.8 trillion gallons supplied to country,s households in 1 month
To find usage per household, divide the supply per month by the number of households
=0.8 × 1000,000,000,000 gallons/100,000,000 households
=0.8×10,000 gallons/household
=8000 gallons/household per month
If you would have to graph x=7, you probably know that this is a vertical line at, well, x=7.
| x | = 7 is nothing more than two vertical lines, namely x=7 or x=-7, as you already wrote down.
| x | = -8 has no (real) solutions, so there is nothing to graph.
Answer:
(b) 67
Step-by-step explanation:
A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...
T = (final temp) + (initial difference)×(decay factor)^t
where the decay factor is the fraction of change during 1 unit of time period t.
__
Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...
T = 25 +75(65/75)^t
Then for t=4, the temperature is ...
T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees
After 4 minutes the temperature of the coffee is about 67 degrees.
