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
aivan3 [116]
2 years ago
11

Last year, the number of students at RSM increased by 100%. This year, the number of students increased by 150%. What percent of

the number of students now equals the number of students two years ago?.
Mathematics
1 answer:
expeople1 [14]2 years ago
4 0

Answer:

increasing by N% means the new value is 1+N/100 as much as the old value. So, we have

new = old*(1+1)(1+1.5) = 5.00 * old so, old = new/5 or 20%

Step-by-step explanation: i hope this answer your question.

You might be interested in
Which values are solutions to the inequality below? Check all that apply <img src="https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%7D%20"
MaRussiya [10]
X > 169 is your Answer thus: b:/d & f:
5 0
3 years ago
I need help please !!
lana [24]
What do you need help with?
3 0
3 years ago
Read 2 more answers
The local oil changing business is very busy on Saturday mornings and is considering expanding. A national study of similar busi
eimsori [14]

Answer:

t=\frac{4.2-3.6}{\frac{1.4}{\sqrt{16}}}=1.714

Reject the null hypothesis if the observed "t" value is less than -2.131 or higher than 2.131  

Rejection Zone: t_{calculated} or t_{calculated}>2.131

In our case since our calculated value is not on the rejection zone we don't have enough evidence to reject the null hypothesis at 5% of significance.

Step-by-step explanation:

Previous concepts  and data given  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

\bar X=4.2 represent the sample mean  

s=1.4 represent the sample standard deviation  

n=16 represent the sample selected  

\alpha=0.05 significance level  

State the null and alternative hypotheses.    

We need to conduct a hypothesis in order to check if the mean is different from 3.6, the system of hypothesis would be:    

Null hypothesis:\mu = 3.6    

Alternative hypothesis:\mu \neq 3.6    

If we analyze the size for the sample is < 30 and we know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:    

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)    

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".    

Calculate the statistic  

We can replace in formula (1) the info given like this:    

t=\frac{4.2-3.6}{\frac{1.4}{\sqrt{16}}}=1.714

Critical values

On this case since we have a bilateral test we need to critical values. We need to use the t distribution with df=n-1=16-1=15 degrees of freedom. The value for \alpha=0.05 and \alpha/2=0.025 so we need to find on the t distribution with 15 degrees of freedom two values that accumulates 0.025 of the ara on each tail. We can use the following excel codes:

"=T.INV(0.025,15)" "=T.INV(1-0.025,15)"

And we got t_{crit}=\pm 2.131    

So the decision on this case would be:

Reject the null hypothesis if the observed "t" value is less than -2.131 or higher than 2.131  

Rejection Zone: t_{calculated} or t_{calculated}>2.131

Conclusion    

In our case since our calculated value is not on the rejection zone we don't have enough evidence to reject the null hypothesis at 5% of significance.

3 0
3 years ago
5 gallons 11 quarts divided by 5
bekas [8.4K]
1.55 us gallons.
hope i could help!
Thunderclan89
8 0
3 years ago
Read 2 more answers
What is b when b^2=46
lianna [129]

Answer:

b^2 = 46

b = √46 (or 6.78 rounded)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Gavin bought 6.5 dozen carnations. He spent $68.25 on the flowers. How much did each flower cost? First, find the total number o
    12·1 answer
  • An object is moving at a speed of 470 centimeters every 3 hours. Express this speed in inches per minute. Round the answer to th
    14·1 answer
  • The average amount of money spent by a person who attended a local sporting event in 2000 was $8.00, of which 75% was the ticket
    11·2 answers
  • The principal represents an amount of money deposited in a savings account subject to compound interest at the given rate.
    11·1 answer
  • Please ANswer ASAP &amp; show all work. If you put an incomplete or absurd answer I WILL report you.
    11·1 answer
  • Asif sees a pair of shoes in turkey the shoes cast.
    9·1 answer
  • Which phrase best describes the translation from the graph y = (x + 2)2 to the graph of y = x2 + 3?
    6·1 answer
  • -4x + 2(5x - 6) = 6(x - 2)
    6·1 answer
  • Graph the following equation on the graph C = 7250 + 205s
    10·1 answer
  • A tomato sauce recipe calls for 3/4 Cups of basil for each 1/8 teaspoon of salt. If 1 cup of basil
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!