To answer this item, we have 4 as the speed of the kayaker in still water and the speed of current be y.
When the karayaker moves upstream or against the current, his speed would be 4 - y. Further, if he moves downstream or with the current, the total speed would be 4 + y. The time utilized for the travel is equal to the ratio of the distance and the speed.
Total time = 9/(4 - y) + 9/(4 + y) = 6
We multiply the equation by (4-y)(4+y)
9(4-y) + 9(4 + y) = 6(4-y)(4+y)
Simplifying,
72 = 96 - 6y²
Transposing all the constants to only one side of the equation and rearranging,
6y² = 96 - 72
y² = 4
y = 2
Hence, the speed of the river's current is 2 miles/hr. <em>The answer is letter B.) 2 miles/hour.</em>
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Answer: 2.92
I hope this helped!
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- Zack Slocum
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At day 0 the height of the plant = 12 cm
Calculate how many days to get to 16.13 cm:-
16.13 = 12(1.03)^n
1.03^n = 16.13 / 12 = 1.34417
n = ln 1.34417 / ln 1.03 = 10 days
I would think that a reasnable domain would be 0 =< n <= 100
$24.22
the 9 makes the 1 before it round up to a 2. With money you need to round it to the hundredth place, not thousandths.
1. 2×2×2×2= 16
2. 1/4×1/4= 1/16
3.8×8= 64
4. 4×4×4=64
5.2/3×2/3×2/3= 8/27
6. 0.6×0.6= 9/25
8a. brackets
8b. 109 is the answer
sorry don't know the answer for the question 7.
hope it helps though.
