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
Alinara [238K]
1 year ago
6

A flagpole casts a 20-foot shadow at the

Mathematics
1 answer:
storchak [24]1 year ago
6 0

Answer:

20-foot shadow

Step-by-step explanation:

You might be interested in
The average expenditure on Valentine's Day was expected to be$100.89 (USA Today, February 13, 2006). Do male and femaleconsumers
stealth61 [152]

Answer:

(a) $62.16

(b) Male: $15.00

Female: $10.06

(c) Confidence Interval for male expenditure is ($106.40, $136.40)

Confidence interval for female expenditure is ($49.18, $69.30)

Step-by-step explanation:

(a) Male expenditure

Sample mean = $135.67, sd=$35, n=40, Z=2.576

Population mean = sample mean - (Z×sd)/√n = 135.67 - (2.576×35)/√40 = 135.67 - 14.27 = $121.40

Female expenditure

Sample mean= $68.64, sd=$20, n=30, Z=2.576

Population mean = 68.64 - (2.576×20)/√30 = 68.64 - 9.40 = $59.24

$121.40 - $59.24 = $62.16

(b) Male: Error margin = (t-value × sd)/√n

Degree of freedom = n-1 = 40-1= 39. t-value corresponding to 39 degrees of freedom and 99% confidence level is 2.708

Error margin = (2.708×35)/√40 = 94.78/6.32 = $15.00

Female

Degrees of freedom = n-1 = 30-1 = 29. t-value is 2.756

Error margin = (2.756×20)/√30 = 55.12/5.48 = $10.06

(c) Male

Confidence Interval (CI) = (mean + or - error margin)

CI = 121.4 + 15.00 = $136.40

CI = 121.4 - 15.00 = $106.40

Confidence Interval is ($106.40, $136.40)

Female

CI = 59.24 + 10.06 = $69.30

CI = 59.24 - 10.06 = $49.18

Confidence Interval is ($49.18, $69.30)

7 0
3 years ago
Hey there .. Plz help me solve this . ​
Ivahew [28]

Answer:

I don't understand your question!!!

7 0
2 years ago
What's bigger? (6×5)⁷÷(-3)⁷ or (6×5)⁴÷(-3)⁴​
max2010maxim [7]
The second one is bigger as the square is a even number with the negative whole
7 0
2 years ago
can someone help me answer a trigonometry question? I'm new to this website so I don't know how to write my question out
yarga [219]

maybe you can attach the photo ?

5 0
3 years ago
Plz answer ASAP I don't understand it easy math
Rashid [163]

Answer:

its not there

Step-by-step explanation:

because i saw it

3 0
3 years ago
Other questions:
  • What fraction of 1 pint is 1 cup
    15·1 answer
  • 6 tractors take 7 days to collect
    7·1 answer
  • Awnser me pkeaeeeeeeeeee
    9·1 answer
  • If an addition expression gives the same value as a multiplication expression, what is an advantage of using either method? PLEA
    10·1 answer
  • Samantha surveyed 500 of the students in her school about their favorite color.
    9·1 answer
  • 2(x+1)=3x <br><br> can you show the steps to get the answer as well please
    12·2 answers
  • What would the rate of change?
    7·2 answers
  • Find the unit rate. Kenny reads 58 page in 23 minute. how many pages Kenny reads per minute
    15·1 answer
  • What can be an equation of the line with a slope of −7 that passes through the point (−3,12).
    14·1 answer
  • HELP ME PLEASE! I need to find the Interquartile range of : 0,0,0,1,1,3,3,3,4,4,4,6,6,7,7,7,8,8,9,10
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!