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Ugo [173]
3 years ago
8

Calculate the Unit Rate for each item and circle the better buy.

Mathematics
1 answer:
Alex3 years ago
7 0

Step-by-step explanation:

35 dvds for 490

490 divided by 35 unit rate of $14.00

21 dvds for 210

210 divided by 21 for a unit rate of $10.00

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Hi guys, can anyone help me with this? Many thanks:)
natka813 [3]

Step-by-step explanation:

<h2>y = √—16x²+8x—2√8x+1+2</h2>
3 0
3 years ago
GEOMETRY AID URGENT?
weeeeeb [17]

Lets assume center point of circle as O

OD is the radius of circle . so OD is also 7

All the sides of the triangle are equal . so angle at the center O is 60 degree.

radius = 7

Length of arc CD = \frac{theta}{360} * 2*\pi*r

= \frac{60}{360} * 2*\pi*7

= \frac{1}{6} * 2*\pi*7

= \frac{7\pi}{3}


4 0
3 years ago
PLS HELP 6th grade, I WILL MARK U AS BRAINLIEST PLSSS
Sergio [31]

Answer:

1.75

Other Answer:

1 3/4

7 0
3 years ago
1..A message in a bottle is floating on top of the ocean in a periodic manner. The time between periods of maximum heights is 26
statuscvo [17]

Answer:

See below for answers and explanations (along with a graph attached)

Step-by-step explanation:

<u>Part A</u>

The amplitude of a sinusoidal function is half the distance between the maximum and the minimum. It is given to us that the distance from the highest and lowest point is 6 feet, so our amplitude is 6/2 = 3 feet

<u>Part B</u>

The graph's function would be in the form of y=acos(bx+c)+d where a is the amplitude, \frac{2\pi}{b} is the period, -\frac{c}{b} is the phase/horizontal shift, and d is the average/midline.

We already know our amplitude of a=3 from part A.

Since our period is given to us as 26 seconds, then we can use the equation \frac{2\pi}{b}=26 to find b, which happens to be b=\frac{\pi}{13}.

Since the cosine function starts at its maximum and we want it to start at the average where the bottle travels up, we would need to use the cofunction identity sin(x)=cos(x-\frac{\pi}{2}) which shifts the cosine graph \frac{\pi}{2} units to the right. This means that c=-\frac{\pi}{2}, making our phase shift -\frac{c}{b}=-\frac{-\frac{\pi}{2}}{\frac{\pi}{13}}=6.5, or 6.5 feet to the right

Our average/midline would be d=12 as given as the average height by the problem.

Therefore, the function is f(x)=3cos(\frac{\pi}{13}x-\frac{\pi}{2})+12

<u>Part C</u>

Using our determined function from Part B, by looking at its graph, we see that the bottle will reach its lowest height of 9 feet after 19.5 seconds (see attached graph).

5 0
2 years ago
Read 2 more answers
If Z= 2+2i, what is z^4?
Dimas [21]

Answer:

assume z is equal to 5.

log(z^4/5) equals log(5^4/5) equals log(5^3) equals 2.096910013.

4 * log(5) - log(5) equals 2.096910013.

they give you the same answer.

this means they're equivalent.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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