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
Sphinxa [80]
3 years ago
7

Mark has a postcard with a width of 3 1/3 inches. He wants to enlarge the postcard by a factor of 9 1/2 to make a poster. Which

of the following is true? A. The poster will have a width of 38 inches. B. The poster will have a width of 28 1/2 inches. C. The poster will have a width of 31 2/3 inches. D. The poster will have a width of 1/6 inches. PLEASE HELP
Mathematics
1 answer:
Anna11 [10]3 years ago
8 0

Answer:

C. The poster will have an width of 31 2/3 inches.

Step-by-step explanation:

3 1/3*9 1/2= 31 2/3 inches

You might be interested in
A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled
klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5

The standard deviation of the sample is calculated as:

s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8

Then, we can calculate the standard error of the mean as:

\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5

6 0
3 years ago
How old am I if 300 reduced by 2 times my age Is 114
vova2212 [387]
The answer is 93 years old.
6 0
3 years ago
Read 2 more answers
1,868 to the nearest hundred
Citrus2011 [14]

Answer: 1,900

Step-by-step explanation:

You would round up to 1,900 because in the tens place is a 6 and when you have a number greater than or equal to 5 you round up. Hope this helps!

7 0
3 years ago
A fish tank in a pet store has 23 fish in it. 10 are orange and 13 are white. Determine the probability that if we select 4 fish
Gala2k [10]

Answer:

ok so the probility of gettting one white fish is

13/23

and if we take out one white fish the problity is

12/22

so we just multiply

12/22*13/23=0.30830039525

so the problity is 0.30 if you choose two fish you will get white for both

3 0
3 years ago
How do you graph y= -5
olchik [2.2K]
Since y=k, there is a slope of zero, which is just a horizontal line k units from the x-axis.  In this case k=-5, so the graph of y=-5 is a horizontal line 5 units below the x-axis...
7 0
3 years ago
Other questions:
  • What is the distance between the points (4,-2) and (-1,10)?
    12·1 answer
  • A function f(x) is graphed on the coordinate plane.
    10·2 answers
  • Which of the following is an example of a null hypothesis? A. The average quantity of detergent put into a box by this filling m
    13·1 answer
  • What is the Mean Absolute Deviation:
    11·1 answer
  • What is the inverse of f (x)=10-×^2
    12·1 answer
  • Please help ggghhhhhhhhhhhgghhhugugugh
    8·1 answer
  • PLS HELP <br> NO LINKS OR I WILL REPORT <br> WILL MARK BRAINLIEST
    15·1 answer
  • 409.0113 x230.2190931
    14·1 answer
  • I could really use help ASAP please​
    12·2 answers
  • Which table represents a linear function?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!