Answer:
total area is bottom rectangle area+ upper rectangle area + two triangles.
whole area.
(24x19) + (13x9) +(24x13) =885
area of trapezoid
whole area - bottom rectangle
885-(24x19) = 429
162 in.=13 1/2 feet
15 feet is longer by 1 1/2 feet
Answer:
99% (two-sided) confidence interval for the true average echo duration µ is
(0.73<µ<0.89)
Step-by-step explanation:
Confidence Interval can be calculated using M±ME where
- M is average radar echo duration (0.81 sec)
- ME is the margin of error from the mean
And margin of error (ME) around the mean can be calculated using the formula
ME= where
- z is the corresponding statistic in 99% confidence level(2.58)
- s is the standard deviation of the sample(0.34)
- N is the sample size(110)
Then ME= ≈0,084
99% Confidence interval would be 0.81±0,08 or (0.73, 0.89)
What do the two variables in this system represent?
the two variables represent the number of hot dogs or soft drinks you will get.
Write a system of equations to represent the model.
let s = soft drinks and let h = hot dogs
3s+2h=7.70
2s+h=4.55
What is the cost of 1 soft drink? <u>$1.4</u>
What is the cost of 1 hot dog? <u>$1.75</u>
Solving for the above two questions
<u>solve the second eqaution for h:</u>
2s+h=4.55
subtract 2s
h=4.55-2s
<u>substitute this into the first equation:</u>
3s+2(4.55-2s)=7.70
distribute the 2
3s+9.1-4s=7.70
add like terms
-s+9.1=7.70
subtract 9.1
-s=-1.4
divide by -1
s=1.4
<u>substitute into the equation for h:</u>
h=4.55-2s
h=4.55-2(1.4)
h=4.55-2.8
h=1.75
answer:the answer would be c . 46 liters !!
Step-by-step explanation:if its wrong please correct me .