It took a race car driver 3 hours and 15 minutes to go 500 miles. What was his mean rate of speed, to the nearest tenth of a mil
2 answers:
Answer:
The mean rate of the racer is 153.8 mph.
Step-by-step explanation:
It took a race car driver 3 hours and 15 minutes to go 500 miles.
Now converting 3 hours and 15 minutes to hours.
15 minutes = hours
Now, we have that it took a race car driver 3.25 hours to go 500 miles.
So, the average speed will be = =153.8 mph
Hence, the mean rate of the racer is 153.8 mph.
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Answer:
or 1.9099
Step-by-step explanation:
Look for y values at each of those given values of "x" and apply the slope formula. When x = pi. y = -1 so the coordinate is . When x = 3pi/2, y = 2 so the coordinate is
Plug those values into the slope formula:
You need a common denominator of pi:
Do the math on that to get a slope of
Answer:
<em>It will take 9 years for the population to double</em>
Step-by-step explanation:
<u>Exponential Growth </u>
The natural growth of some magnitudes can be modeled by the equation:
Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.
The population of a city grows at a rate of r=8% = 0.08 per year. We are required to find when (t) the population will double, or P=2Po.
Substituting in the equation:
Simplifying:
Taking logarithms:
Applying the exponent property of logs:
Solving for t:
Calculating:
It will take 9 years for the population to double