The distance, s = 40t₁ where t₁ is the time to complete the outward journey.
The same distance = vt₂ where t₂ is the time to complete the return journey at speed v.
For the whole journey, 2s=60(t₁+t₂). Therefore s=30(t₁+t₂)=40t₁=vt₂.
30t₁+30t₂=40t₁, 10t₁=30t₂, t₁=3t₂, so s=120t₂=vt₂ and v=120kph.
Answer:
If you add the money that Chris has used, and subtract it from his total, you will get the amount that Chris has left in change.
0.79 + 1.69 + 1.00 = 3.48
4.00 - 3.48 = 0.52
Chris has 52 cents left in change.
I hope this helps!
When Stacy draws the first marble, her probability of drawing one of the 7 marbles from the 14 in the bag is
7/14. When she draws the second marble, her probability of drawing one of the 6 remaining white marbles from the remaining 13 in the bag is
6/13.
Her probability of drawing two white marbles in succession from the bag is ...
matches the
2nd selection
"The two pumps working together would pump out water at a rate of 100 gallons per minute. To determine the time it takes to completely pump out the water from the basement, we need to determine the volume of the water in the basement. The dimensions of the basement is 40 feet by 50 feet (given elsewhere) while the depth of the water is said to be 16 inches. From these dimensions, we can calculate for the volume as follows:"
V = length x width x depth
length = 50 feet
width = 40 feet
depth = 16 inches ( 1 foot / 12 inches ) = 1.33 feet
V = 50 x 40 x 1.33 = 2666.67 ft^3 = 19948.05 gal
Time = V / rate
Time = 19948.05 gal / 100 gal / min
Time = 199.48 min
