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aivan3 [116]
3 years ago
5

HELP PLEASE ON NUMBER 5!

Mathematics
1 answer:
melamori03 [73]3 years ago
5 0

Answer:

2.5 hours is the time it will take.

Step-by-step explanation:

50t + 55t-30 = 235

105t = 265

T = 2.5 hours (rounded to one d.p)

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Please see the image and help with this homework problem. thank you!
dimulka [17.4K]

we have the function

E=\sin \frac{\pi}{14}t

Part a

For t=7

substitute in the given function

\begin{gathered} E=\sin \frac{\pi}{14}7 \\ E=1 \end{gathered}

For t=14

\begin{gathered} E=\sin \frac{\pi}{14}14 \\ E=0 \end{gathered}

For t=21

\begin{gathered} E=\sin \frac{\pi}{14}21 \\ E=-1 \end{gathered}

For t=28

\begin{gathered} E=\sin \frac{\pi}{14}28 \\ E=0 \end{gathered}

For t=35

\begin{gathered} E=\sin \frac{\pi}{14}35 \\ E=1 \end{gathered}

Observation: The values of E varies from -1 to 1, including the zero

Part B

Remember that

The Period goes from one peak to the next

so

Period=2pi/B

B=pi/14

Period=(2pi)/(pi/14)=2pi*14/pi=28

<h2>the period is 28 days</h2>
6 0
2 years ago
a square pyramid has a height of 14 cm and a base side length of 7 cm. What is the volume of the pyramid. Show work
Brut [27]

Step-by-step explanation:

The volume of a pyramid or cone is:

V = ⅓ Ah

where A is the area of the base and h is the height.

The pyramid has a square base, so:

A = s²

A = (7 cm)²

A = 49 cm²

The height is 14 cm, so the volume is:

V = ⅓ (49 cm²) (14 cm)

V = 686/3 cm³

V ≈ 228.67 cm³

7 0
3 years ago
You buy a 1:1000 scale model of the Statue of Liberty during a trip to New York City. The height of the model is 9.3 centimeters
yanalaym [24]
The Statue of Liberty is 93 meters tall. If you have a model that is 9.3 centimeters and is 1/1000 the size of the actual Statue, then you would multiply the model by 1000 to get 9,300 centimeters. To get this number in meters, you would divide your result by 100. This would give you 93 meters.

Sorry if the explanation is worded poorly, the answer is 93 meters.

7 0
3 years ago
a certain area covers 4800km squared,the area decreases by 6.75% each year what will the area be in 13 years?
Darina [25.2K]

The answer is 588 because if you multiply 6.75 percent of 4800 by 13, and then subtract it from 4800, you get 588.

6 0
3 years ago
The heights of women aged 30 to 35 are approximately Normal with mean 63 inches and standard deviation 2.4 inches. Men the same
gavmur [86]

Answer

given,

mean of women  (μ)=63 inches

standard deviation of women (σ)= 2.4 inches

mean of men (μ)=70 inches

standard deviation of women (σ)= 2.5 inches

for women

P(x>66)

P(x>66) = 1-P( \dfrac{x - \mu}{\sigma}

P(x>66) = 1-P( z

P(x>66) = 1-P( z

using z-table

P(x>66)= 1 - 0.8944

P(x>66)=0.1056[/tex]for men[tex]P(x>66)

P(x>66) = 1-P( \dfrac{x - \mu}{\sigma}

P(x>66) = 1-P( z

P(x>66) = 1-P( z

using z-table

P(x>66)= 1 - 0.0548

P(x>66)=0.9452

4 0
4 years ago
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