Answer:12000
Step-by-step explanation:
During the Playoff the schools football team has on average 30% their games than during the regular season
The average for this year's playoffs attendance was 15,600 fans
To get the number of fans during a regular season goes thus:
Since there is an increase of 30%, we add 100% to 30% which gives:
100% + 30% = 130%
= 15600 ÷ 130%
= 15600 ÷ 130/100
= 15600 × 100/130
= 15600 × 0.7692
= 12000
There are 12000 fans during a regular season
Answer:
(B) The correct interpretation of this interval is that 90% of the students in the population should have their scores improve by between 72.3 and 91.4 points.
Step-by-step explanation:
Confidence interval is the range the true values fall in under a given <em>confidence level</em>.
Confidence level states the probability that a random chosen sample performs the surveyed characteristic in the range of confidence interval. Thus,
90% confidence interval means that there is 90% probability that the statistic (in this case SAT score improvement) of a member of the population falls in the confidence interval.
X-2
Hope this helps!
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4. -8
5. 24
6. I can't see it properly so if it's ÷ answer is 9 if it's - answer is -70
STEP 1:
convert meters to centimeters
100 cm= 1 meter
= 100 cm/m * 2.5 m
= 250 cm
STEP 2:
x= length of first shelf
2x+18= length of second shelf
x-12= length of third shelf
x+4= length of fourth shelf
since the whole board has to be used, add lengths of all shelves and set it equal to the whole length of the board (250 cm).
x + (2x+18) + (x-12) + (x+4)= 250 cm
combine like terms
5x + 10= 250
subtract both sides by 10
5x= 240
divide both sides by 5
x= 48
STEP 3:
find length of second shelf
= 2x + 18
= 2(48) + 18
= 114 cm
CHECK:
x + (2x+18) + (x-12) + (x+4)= 250
48 + (2(48)+18) + (48-12) + (48+4)= 250
48 + (96+18) + 36 + 52= 250
48 + 114 + 36 + 52= 250
250= 250
ANSWER: Shelf two is 114 cm.
Hope this helps! :)
