Answer:
403
Step-by-step explanation:
Answer: R/2 (A)
Step-by-step explanation:
In Ophiuchus Corporation, 60% of the total revenue R is allocated to the advertising budget. This will be
60% of R
= 3/5 × R
= 3R/5
Five-sixths of this advertising budget was spent on television advertising. This means 5/6 of 3R/5.
= 5/6 × 3R/5
= 3R/6
= R/2
The dollar amount spent on television advertising is R/2.
It would be B because she spends more than 25%
For this, combine like terms. In this case, the like terms are 3x-2x, 2y+3y, and (-5). Combine them, and your answer will be 
The confidence interval for confidence level of 
is
where 
is the sample mean, 
is the critical value for the given confidence level, 
is the standard deviation of the population, and 
is the sample size. The margin of error is the 
term.
a) For a confidence level of 
, we have 
. So in order to have a margin of error of at most 25 points, we have
so Raina should collect a sample of at least 269 students.
b) A confidence interval with a higher confidence level would more closely approximate and reflect the population, so it stands to reason that Luke should collect a larger sample than Raina to meet his 99% confidence spec.
c) For a confidence level of 
, we have 
. Then the margin of error would at most satisfy
so that Luke should collect a sample of at least 666 students.
