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ale4655 [162]
3 years ago
10

Maris has 1,400 minutes to use on her cell phone. She has used 45% of her minutes. How many minutes has she used?

Mathematics
2 answers:
KiRa [710]3 years ago
7 0

Answer:

630 minutes

Step-by-step explanation:

.45 (percentage) multipled by the total number of minutes she has (1,400) equals 630.

nevsk [136]3 years ago
7 0

Answer:

The answer is 630.

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AlladinOne [14]
I pretty sure it’s A
3 0
2 years ago
On day t=0t=0t, equals, 0, the stock is at its average value of {\$}3.47$3.47dollar sign, 3, point, 47 per share, but 91.2591.25
Norma-Jean [14]

Answer:

S(t) = a.sin (b.t) + d

a = -1.5, b = (2π/365), d = 3.47

S(t) = -1.5 sin (2πt/365) + 3.47

Step-by-step explanation:

Complete Question is presented in the attached image to this solution.

- Dingane has been observing a certain stock for the last few years and he sees that it can be modeled as a function S(t) of time t (in days) using a sinusoidal expression of the form

S(t) = a.sin(b.t) + d.

On day t = 0, the stock is at its average value of $3.47 per share, but 91.25 days later, its value is down to its minimum of $1.97.

Find S(t). t should be in radians.

S(t) =

Solution

S(t) = a.sin(b.t) + d.

At t = 0, S(t) = $3.47

S(0) = a.sin(b×0) + d = a.sin 0 + d = 3.47

Sin 0 = 0,

S(t=0) = d = 3.47.

At t = 91.25 days, S(t) = $1.97

But, it is given that T has to be in radians, for t to be in radians, the constant b has to convert t in days to radians.

Hence, b = (2π/365)

S(91.25) = 1.97 = a.sin(b×91.25) + d

d = 3.47 from the first expression

S(t = 91.25) = a.sin (91.25b) + 3.47 = 1.97

1.97 = a.sin (2π×91.25/365) + 3.47

1.97 = a sin (0.5π) + 3.47

Sin 0.5π = 1

1.97 = a + 3.47

a = -1.5

Hence,

S(t) = a.sin (b.t) + d

a = -1.5, b = (2π/365), d = 3.47

S(t) = -1.5 sin (2πt/365) + 3.47

Hope this Helps!!!

6 0
3 years ago
How many 4/5 cup servings in 8 cups
Molodets [167]
To solve this question, we use simple division:
\frac{8}{ \frac{4}{5} } = 8* \frac{5}{4} = \frac{40}{4} = 10

So, there are 10 servings of 4/5 of a cup in 8 cups.
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Help me on this please
KonstantinChe [14]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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