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Romashka [77]
3 years ago
10

Three-fourths the square of a number

Mathematics
1 answer:
Burka [1]3 years ago
5 0
The last one is correct
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The depth of the water at the end of a pier changes periodically along with the movement of tides. On a particular day, low tide
Valentin [98]
Draw a diagram to illustrate the problem as shown in the figure below.

The minimum depth of 2.5 m occurs at 12:00 am and at 12:30 pm.
Therefore the period i0s T= 12.5 hours.
The maximum depth of 5.5 m occurs at 6:15 am and at 6:45 pm. Therefore the period of T = 12.5 hours is confirmed.

The double amplitude is 5.5 - 2.5 = 3 m, therefore the amplitude is a = 1.5 m.
The mean depth is k = (2.5 + 5.5)/2 = 4.0 m

The model for tide depth is
d=-1.5cos( \frac{2 \pi t}{12.5})+4

That is,
d = -1.5 cos(0.5027t) + 4
where 
d = depth, m
t = time, hours

A plot of the function confirms that the model is correct.

8 0
3 years ago
Read 2 more answers
What is the halving and doubling strategy
malfutka [58]
Halving-reduce by half or think what is fifty% of the number or divide by two
doubling-add the number you got to the same number or multiply by two

Halving Ex.:6/2=3

Doubling ex.: 9+9=18 or 6*2=12
6 0
3 years ago
Show the formula for finding the area of a parallelogram
liq [111]
Base times height equals area of a parallelogram
8 0
3 years ago
6(2 + 4) -1 divided by 2.3+1
Tcecarenko [31]

Answer:

when 6(2+4) -1 divided by 2.3 + 1 the answer is 36.5652174

6 0
3 years ago
In triangle ABC, a = 18.2, ∠B = 62°, and ∠C = 48°. Find b
Pavlova-9 [17]
I believe b is about 16.3, hope this helps
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3 years ago
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