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
BARSIC [14]
3 years ago
12

4 sin180 degrees + 2 sec0 degrees

Mathematics
1 answer:
vaieri [72.5K]3 years ago
6 0
Sin(180°) = 0
sec(0°)=1
4(0)+2(1)=2
You might be interested in
A clinical trial was conducted to test the effectiveness of the drug zopiclone for treating insomnia in older subjects. Before t
aleksklad [387]

Answer:

We cannot say that the mean wake time are different before and after the treatment, with 98% certainty. So the zopiclone doesn't appear to be effective.

Step-by-step explanation:

The goal of this analysis is to determine if the mean wake time before the treatment is statistically significant. The question informed us the mean wake time before and after the treatment, the number of subjects and the standard deviation of the sample after treatment. So using the formula, we can calculate the confidence interval as following:

IC[\mu ; 98\%] = \overline{y} \pm t_{0.99,n-1}\sqrt{\frac{Var(y)}{n}}

Knowing that t_{0.99,15} = 2.602:

IC[\mu ; 98\%] = 98.9 \pm 2.602\frac{42.3}{4} \Rightarrow 98.9 \pm 27.516

IC[\mu ; 98\%] = [71.387 ; 126,416]

Note that 102.8 \in [71.384 ; 126.416] so we cannot say, with 98% confidence, that the mean wake time before treatment is different than the mean wake time after treatment. So the zopiclone doesn't appear to be effective.

7 0
3 years ago
5540 in scientific notation
never [62]

Answer:

Therefore, the decimal number 5540 written in scientific notation is 5.54 × 103 and it has 3 significant figures.

Step-by-step explanation:

PLS BRAINLEST PLS PLS PLS

6 0
3 years ago
Read 2 more answers
Pleaseee help
Semenov [28]

Answer:

1. 2/4 = 1/2

2. 9/24= 3/8

3. 56/64= 7/8

Step-by-step explanation:

6 0
3 years ago
I need help on ratio of x-coordinates and ratio of y-coordinates
ad-work [718]

Answer:

Ratio of x-coordinates:

\frac{-1}{-2}=\frac{1}{2}

\frac{2}{4}=\frac{1}{2}

\frac{2}{4}=\frac{1}{2}

\frac{-2}{-4}=\frac{1}{2}

Ration of y-coordinates:

\frac{2.5}{5}=\frac{1}{2}

\frac{1}{2}=\frac{1}{2}

\frac{-2}{-4}=\frac{1}{2}

\frac{-2}{-4}=\frac{1}{2}

Step-by-step explanation:

The table is asking for the ratio of x-coordinates for each point (A, B, C and D) for both the image and pre-image.  The ratio is the image 'x' or 'y' value ÷ the pre-image 'x' or 'y' value.  Each ratio should be expressed in simplest form and should show the same pattern of dilation, or same scale factor.  In this case, the second figure is 1/2 the size of the original figure.  

5 0
3 years ago
What is the ratio of 15 to 21
Step2247 [10]

Answer:

Ratio: 15:9

hope this helps :)



4 0
3 years ago
Read 2 more answers
Other questions:
  • What is 4 wholes and 49 over 100 in decimal form
    6·2 answers
  • A centimeter is __________ meter(s). Question 1 options: 1000 100 1/100th 1/1000th
    5·2 answers
  • Maya picks 16 vegetables from her garden.
    15·1 answer
  • A machine at a factory fills 20 bottles per minute. Which rate is equal to this unit rate
    14·1 answer
  • Kevin can travel 22 1/2 miles in 1/3 hour .What is the average speed in miles per hour?
    15·1 answer
  • You deposit $3000 into an account which earns 5.1% interest per year, compounded annually. your friend simultaneously deposits $
    13·2 answers
  • HELP ! PLEASE <br><br> examine the system of equations.
    15·1 answer
  • What is the sum of the measures of the interior angles of any triangle?
    10·2 answers
  • My brother is wondering what 100÷1,000,000 equals.
    8·2 answers
  • What is the slope of a line that passes through the two points (12, -18) and (11,12)
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!