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dybincka [34]
3 years ago
12

Please help ASAP :{ jhjkhybblvklmmm

Mathematics
2 answers:
babunello [35]3 years ago
8 0

Answer:

<h2>C</h2>

Step-by-step explanation:

V=0.5*b*l*h

V=0.5*10*28*12

V=10*14*12

V=10*168

V=1680 m^3 or C

Andrew [12]3 years ago
5 0

Answer:

C. 1680 m³

Step-by-step explanation:

Find the base of the triangular prism:

\frac{1}{2}*28m*12m=\\14m*12m=\\168m^2

Now we can multiply the base by the height, 10.

168m^2*10m=\\1680m^3

Our answer is C. 1680 m³

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The mass of the particles that a river can transport is proportional to the fifth power of the speed of the river. A certain riv
vlada-n [284]

Answer: V = 5.22m/s

Step-by-step explanation:

Given that the mass of the particles is proportional to the fifth power of the speed. That is

M = k V^5

Where M = mass and V = speed

K = constant of proportionality

A certain river normally flows at a speed of 3 miles per hour

V = 3 mph

M = unknown

M = k × 3^5

M = 243K

K = M/243 ........(1)

What must its speed be in order to transport particles that are 16 times as massive as usual

M = 16M

Using same formula

I.e M = KV^5

16M = M/243 × V^5

M will cancel out

16 = V^5/243

V^5 = 3888

V = 5.22m/s

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4 years ago
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dimulka [17.4K]

Answer:

You Might Be Good At It.

Step-by-step explanation:

8 0
3 years ago
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vlabodo [156]

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Step-by-step explanation:

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3 years ago
The temperature of a chemical reaction ranges between 20 degrees Celsius and 160 degrees Celsius. The temperature is at its lowe
vichka [17]

Answer:

The answer is teh second option f(t) = -70cos(\frac{\pi}{4}t) +90

Step-by-step explanation:

The cosine functions have the following form:

f(t) = Acos (bt) + k

Where A is the amplitude of the wave. The amplitude of a wave is equal to half the distance between its largest peak and its smallest peak.

\frac{2\pi}{b} is the period. The period is the time t that the wave takes to complete a cycle.

k is the vertical displacement of the wave.

In this problem f(t) measures the temperature in degrees Celsius and goes from 20 degrees Celsius to 160 degrees. It is never negative, then

Then we can find its amplitude A.

A = |\frac{(160-20)}{2}|= 70

The period is 8 hours.

Then we can find b.

8 = \frac{2\pi}{b}\\\\b = \frac{2\pi}{8}\\\\b =\frac{\pi}{4}

Then, we know that when t = 0, the wave must be at its minimum value f(t) = 20

Then we find k

f(t = 0) = 20 = -70cos(\frac{\pi}{4}(0)) + k\\\\20 = -70 + k\\\\k = 90

So

The function is:

f(t) = -70cos(\frac{\pi}{4}t) +90

8 0
3 years ago
n a certain clothing store, 6 shirts and 3 ties cost $79.50, and 3 shirts and 2 ties cost $41. Determine the cost of each shirt.
yarga [219]
That answer would be correct
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