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RSB [31]
3 years ago
13

John can ride his skate board 100 feet in 4.6 seconds. how fast is this in miles per hour?

Mathematics
1 answer:
diamong [38]3 years ago
4 0
About .24 mile per hour
60 \div 4.6 = 13.04 \\ 13.04 \times 100 = 1304.34
1 mile is 5280 foot
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The birth rate of a population is b(t) = 2300e0.021t people per year and the death rate is d(t)= 1450e0.018t people per year, fi
Cerrena [4.2K]

Answer:

38,674.This area represents the increase in population over a 10-year period.

Step-by-step explanation:

When graphed over the interval 0 ≤ t ≤ 10, the birth rate is more than the death rate. This means the area between the two curves is the amount of births subtract the amount of deaths. This results in an area which means the increase of the population.

The birth rate is graphed in green and the death rate is graphed in blue.

To find the area, take the integral of the difference of the functions:

\int\limits^{10}_0 {2300e^{0.021t} - 1450e^{0.018t} } \, dt \\\\\frac{2300e^{0.021t}}{0.021} -  \frac{1450e^{0.018t}}{0.018} \\\\(\frac{2300e^{0.21}}{0.021} -\frac{1450e^{0.18}}{0.018} ) - (\frac{2300}{0.021}- \frac{1450}{0.018} ) \\\\135117.12 - 96442.51 \\\\38,674

7 0
3 years ago
Which is the graph inequality x-2y_>-12
Zigmanuir [339]

Answer:

The graph for x-2y>=-12 needs to get y aloneso add 2y to both sides to getx >=-12 +2ythen add 12 to both sides of the in equalityx+12 >=2ynext divide each term by 2x/2 + 6 >= yy<= x/2 + 6so the graph connects (0,6) and (2,7) and shade below the solid line

5 0
3 years ago
When resting, Tara’s heart beats 68 times a minute. Explain why this is an example of a unit rate?
Eduardwww [97]

There are two variables here, which are time (minutes) and the number of beats, and they both have a relationship (68 beats in one minute), therefore it is an example of a unit rate

4 0
3 years ago
Read 2 more answers
The probability of drawing two red candies without replacement is 1335 , and the probability of drawing one red candy is 25 . Wh
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The probability would be 50 because 25+25=50

3 0
2 years ago
PLEASE HELP ME!!!!!!!! 
Delicious77 [7]
Angle θ between two vectors is given by, \theta =cos^{-1}( \frac{u&#10; \cdot v}{|u||v|} ); where u \cdot &#10;v=-5(-4)+(-4)(-3)=20+12=32; |u|= \sqrt{ (-5)^{2} + (-4)^{2} } = &#10;\sqrt{25+16} = \sqrt{41} and |v|=\sqrt{ (-4)^{2} + (-3)^{2} } = &#10;\sqrt{16+9} = \sqrt{25}=5.
Therefore, \theta =cos^{-1}( \frac{32}{ 5\sqrt{41}} )=cos^{-1}0.9995=1.8^o
3 0
3 years ago
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