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
miv72 [106K]
2 years ago
10

1. What number is 35% of 80?​

Mathematics
2 answers:
Stella [2.4K]2 years ago
6 0

Answer: 28

Step-by-step explanation: 80 x 0.35 = 28

koban [17]2 years ago
3 0

when we multilpy we get 80×0.35 = 28

You might be interested in
Order these numbers from least to greatest.<br> 2.9, 2.207, 3.76, 2.27
Lelu [443]

Answer:

From least to greatest, the order would go: 2.207, 2.27, 2.9, 3.76.

Step-by-step explanation:

To find the least greatest number, we have to look at each digit. In this number sequence, the least greatest number is a 2 for the single digit. With those 2s, 2.2 is the lowest out of them. And out of the 2.2s, the 2.207 is smaller than the 2.27. The 2.27 is the next number, then the 2.9 and then the 3.76.

Hope this helps! :)

7 0
3 years ago
Read 2 more answers
At Lauren's school library, students are allowed to have a balance of no less than -$12 and still check out books. Five days ago
denis-greek [22]
Yes because the fee will be $2×5(Days)=10 so she can still check out books but she can't have anymore late
8 0
3 years ago
Read 2 more answers
An SRS of 350 high school seniors gained an average of x¯=21 points in their second attempt at the SAT Mathematics exam. Assume
Lynna [10]

Answer:

a) 21-2.58\frac{52}{\sqrt{350}}=13.83  

21+2.58\frac{52}{\sqrt{350}}=28.17  

So on this case the 99% confidence interval would be given by (13.83;28.17)  

b) ME=2.58\frac{52}{\sqrt{350}}=7.17

c) ME=2.58\frac{52}{\sqrt{100}}=13.42

d) D. Decreasing the sample size increases the margin of error, provided the confidence level and population standard deviation remain the same.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

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".  

Part a

\bar X=21 represent the sample mean  

\mu population mean (variable of interest)  

\sigma=52 represent the population standard deviation  

n=350 represent the sample size  

99% confidence interval  

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}} (1)  

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that z_{\alpha/2}=2.58  

Now we have everything in order to replace into formula (1):  

21-2.58\frac{52}{\sqrt{350}}=13.83  

21+2.58\frac{52}{\sqrt{350}}=28.17  

So on this case the 99% confidence interval would be given by (13.83;28.17)  

Part b

The margin of error is given by:

ME=2.58\frac{52}{\sqrt{350}}=7.17

Part c

The margin of error is given by:

ME=2.58\frac{52}{\sqrt{100}}=13.42

Part d

As we can see when we reduce the sample size we increase the margin of error so the best option for this case is:

D. Decreasing the sample size increases the margin of error, provided the confidence level and population standard deviation remain the same.

6 0
3 years ago
In 2010 the Internal Revenue Service allowed a $5,150 deduction for each dependent. In 2005 it was a $3,200. If a family has fiv
Aleks04 [339]
5x5,150 =$<span>25,750 = Answer</span>

Deductions per dependent $5,150 times 5 in 2010

6 0
3 years ago
Please help thx so much ​
Mashcka [7]

Answer:

3.140

Step-by-step explanation:

hope this helped

5 0
2 years ago
Read 2 more answers
Other questions:
  • A study will investigate the effectiveness of a new early reading program on
    7·1 answer
  • You work at the library for 25 hours each month for $7 per hour. You also earn $40 each month for completing yard work. Use the
    15·2 answers
  • Please answer with explanation, will give Brainleist
    8·1 answer
  • If you have a new deck of shuffled cards, what is the probability you will choose a red card? (52 cards, no jokers) A) 1 13 B) 1
    8·1 answer
  • A puzzle piece in the shape of a triangle has perimeter 25 centimeters. Two sides of the triangle are each twice as long as the
    10·1 answer
  • The temperature in Frederick decreased 8
    7·1 answer
  • 3, 0, -3, 0, 3, 0 what's the pattern
    9·1 answer
  • 1/3 + a = 5/4 what is a
    14·2 answers
  • The volume of a pyramid is 47m3. The height of the pyramid is 6 meters. What is the area of its base?
    13·2 answers
  • 1) What is the area of a circular pizza pie with a diameter<br> of 12 inches?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!