Example:
4 ÷ 2 = 2 but 2 ÷ 4 = 0.5
In general a ÷ b ≠ b ÷ a, then division is not commutative
Answer:
ΔV = 865.51 mm^3
Step-by-step explanation:
In order to calculate the difference in volume between both baseballs you use the following formula for the volume of a sphere:
(1)
where r is the radius of he sphere.
You calculate the volume of each sphere:
First baseball:
radius = 23.2mm/2 = 11.61mm
![V_1=\frac{4}{3}\pi (11.61mm)^3=6555.18\ mm^3](https://tex.z-dn.net/?f=V_1%3D%5Cfrac%7B4%7D%7B3%7D%5Cpi%20%2811.61mm%29%5E3%3D6555.18%5C%20mm%5E3)
Second baseball:
radius = 24.2mm/2 = 12.1mm
![V_2=\frac{4}{3}\pi (12.10)^3=7420.70\ mm^3](https://tex.z-dn.net/?f=V_2%3D%5Cfrac%7B4%7D%7B3%7D%5Cpi%20%2812.10%29%5E3%3D7420.70%5C%20mm%5E3)
Then, the difference in the volumen of both spheres is:
![\Delta V=V_2-V_1=7420\ mm^3-6555.18\ mm^3=865.51\ mm^3](https://tex.z-dn.net/?f=%5CDelta%20V%3DV_2-V_1%3D7420%5C%20mm%5E3-6555.18%5C%20mm%5E3%3D865.51%5C%20mm%5E3)
Answer:
x equals 10
Step-by-step explanation:
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Step-by-step explanation:
x = speed of hiker1
because they meet, between the 2 of them, together they cover 15 miles in 2 hours.
2×x + 2×(x + 2.7) = 15
2x + 2x + 5.4 = 15
4x = 9.6
x = 2.4 mph
so one hiker was going 2.4 mph,
the other 2.4 + 2.7 = 5.1 mph.