Grace earns $7 for each car she washes. She always saves $25 of her weekly earnings.This week,she wants to have at least $65 in
1 answer:
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Answer:
a.
b.
Step-by-step explanation:
a.
Where,
Where,
Volume of the shaded figure =
b. expressed in factored form:
Look for the term that is common to 9a³ and 9ab², then take outside the parenthesis.
Answer:
n≅376
So sample size is 376.
Step-by-step explanation:
The formula we are going to use is:
where:
n is the sample size
p is the probability of favor
q is the probability of not in favor
E is the Margin of error
z is the distribution
α=1-0.98=0.02
α/2=0.01
From cumulative standard Normal Distribution
p is taken 0.5 for least biased estimate, q=1-p=0.5
n≅376
So sample size is 376