1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gnom [1K]
3 years ago
7

Please answer quick, I will give you Brainliest if you answer right first <3

Mathematics
2 answers:
elena55 [62]3 years ago
7 0
The answer is D because of the dot being closed with a dark circle and on the right side of the dot is open up with no shade of black
harkovskaia [24]3 years ago
3 0
C because when the dot is black it is equal to or greater/less than the number the dot is on and if the dot is blank it is only greater/less than that the number not possibly equal to.
You might be interested in
Two hours later than 11:30 is?
Ahat [919]
1:30 broski good luck
8 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
Exploring Volume of Pyramids
S_A_V [24]

Answer:2h

Step-by-step explanation:

7 0
3 years ago
What is the rule for the reflection?
Step2247 [10]
<span>Reflection in the line y = x. A reflection in the line y = x can be seen in the picture below in which A is reflected to its image A'. The general rule for a reflection in the y-axis: (A, B) (B, A)</span>
4 0
3 years ago
Read 2 more answers
Of the population of all fruit flies we wish to give a 90% confidence interval for the fraction which possess a gene which gives
maks197457 [2]

Answer:

The margin of error for the 90% confidence interval is of 0.038.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene.

This means that n = 400, \pi = \frac{280}{400} = 0.7

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

Give the margin of error for the 90% confidence interval.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 1.645\sqrt{\frac{0.7*0.3}{400}}

M = 0.038

The margin of error for the 90% confidence interval is of 0.038.

8 0
2 years ago
Other questions:
  • The half-life of a radioactive substance is 12 days. After 11 days a sample of the substance has been reduced to a mass of 7 mg.
    14·2 answers
  • If the probability of getting an even number on a game spinner is 4/10 , then the numerator of that probability is:
    7·2 answers
  • If f(x) = x4 + 3x3 – x2 + 6, find f(-3).<br><br> A) -3 <br> B) -2 <br> C) 2 <br> D) 3
    5·1 answer
  • Which, if any, of the following would not generate a sphere?
    14·1 answer
  • What is a mixed number greater than one
    12·2 answers
  • Bridget needs an actor actor is offering her services for initial $250 in addition to $40 per day actor beers offering her servi
    13·1 answer
  • The length of a rectangle is
    15·1 answer
  • Find the slope of the line passing through the points (-4, -3) and (8, -9).
    7·2 answers
  • 2) Three loads of sand weigh a tons. What is the weight of 1 load of sand?
    5·1 answer
  • A cone has a circular base of radius 8m. Given that the total surface area of the cone is 350m^2, find the slant height
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!