Answer:
Question 1 - she will make $10.50 and still owe you $5.25 because 0.35 x 30 = 10.25
question 2 - for this im not sure because the 2nd, 3rd and 4th wont work so it should be the first but I’m not sure what that equation is saying
question 3 - 29 glasses need to be sold
Multiple and add
Step-by-step explanation:
For all of them you multiple 1 and add the inherent that's what area and perimter means
Answer:
pls give me brainliest
Step-by-step explanation:
0.83333333333
Answer:
20 +/- $6.74
= ( $13.26, $26.74)
The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x1-x2 +/- margin of error
x1-x2 +/- z(√(r1^2/n1 + r2^2/n2)
Given that;
Mean x1 = $200
x2 = $180
Standard deviation r1 = $22.50
r2 = $18.30
Number of samples n1 = 60
n2 = 40
Confidence interval = 90%
z(at 90% confidence) = 1.645
Substituting the values we have;
$200-$180 +/-1.645(√(22.5^2/60 +18.3^2/40)
$20 +/- 6.744449847374
$20 +/- $6.74
= ( $13.26, $26.74)
The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)
Answer:
h = 2t + 4
Step-by-step explanation:
Solution:-
- The height of the tree = h
- The number of years elapsed after 2006 = t
- height h1 = 10 ft, t1 = ( 2009 - 2006 ) = 3 yrs
- height h2 = 16 ft, t2 = ( 2012 - 2006 ) = 6 years
- The linear model of tree height "h" as a function of time "t" years after 2006 can be expressed in the form:
h = m*t + c
Where, m = The rate of change of height
c = The initial height of tree in 2006.
- We will use the given data to evaluate constant "m".
Rate = m = ( h2 - h1 ) / ( t2 - t1)
m = ( 16 - 10 ) / ( 6 - 3 )
m = 6 / 3 = 2
- Then use "m" and given set of data to evaluate the initial height of tree "c" in year 2006.
h = 2*t + c
h1 = 2*t1 + c
c = 10 - 2*3 = 4 ft
- The linear model for the height of tree "h" as fucntion of time "t" years after 2006 will be:
h = 2t + 4
