A marketing manager must decide on the size of the survey sample to be used in order to estimate the proportion of customers who are aware of her brand. She wishes to estimate this proportion to within 10 percentage points with 91% confidence. If the manager guesses that the proportion of aware customers is roughly 24%, what is the size of the sample that must be used

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

3100

step-by-step explanation:

step-by-step explanation: