Total distance =(250+90)n
=300 m
time =12 sec
speed time/distance
speed = 12/300
speed =25 sec
126- 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126. I knew that 7 x 9 was wrong because it wasn't divisible by 2 so i multiplied all of them together giving me 126, factored it and voila! :) Hope this helps
Since we have the endpoints of a diameter the center is very easy to find. It is the midpoint of the diameter endpoints, which is just the average coordinates...
The center is:
((-7+3)/2, (-10+2)/2)
(-2,-4)
To find the radius we can use the endpoints again to find the diameter squared and then get the radius from that:
d^2=(dy)^2+(dx)^2
d^2=(2--10)^2+(3--7)^2
d^2=12^2+10^2
d^2=144+100
d^2=244
d=√244, since d=2r, r=d/2
r=√(244/4)
r=√61
The equation of a circle is (x-h)^2+(y-k)^2=r^2. We found earlier that the center was at (-2,-4) and we just saw that r^2=61 so:
(x+2)^2+(y+4)^2=61
Volume= 37. 7
V=π r² h/3 = π · 22 · 9/3 ≈37.69911
I hope this helps!
To get your answer, you simply add $85 plus 3 percent. This gives you 87.55
Hope this helps!
♤MidnightQueen