Answer:Neil is not correct
Step-by-step explanation:
Let us calculate the total cost of the of the apps and headphone without estimation.
He wants to buy 5 apps priced at $0.99 each
Total cost of the 5 apps will be
5 × 0.99 = $4.95
He also wants to buy headphones priced at $15.49.
Since this includes shipping and tax. The total cost the 5 apps and headphone is 4.95 + 15.49 = $20.44
Neil only has a $20 gift certificate for an online store. This is actually lesser than the total cost of the items.
So Neil is wrong
Even if he estimated by rounding up, the most reasonable estimate would be
$1 per app and the 5 apps will cost $5
The headphone will be $15.5
The total would be 5+ 15.5 = $20.5.
This is still more than his gift certificate
<h3>
Answer: Choice C</h3>
The x input of a square root function can be 0 or larger. If you take the square root of a negative number, then you'll get a complex number as a result. So we restrict the domain so that y is a real number.
We can say or we can write what choice C shows to be more thorough, but they mean the same thing.
note: converts to the interval notation
Answer:
a)
And replacing we got:
b)
And using the normal standard distribution table and the complement rule we got:
Step-by-step explanation:
From the info given if we define the random variable X as "amount of saturated fat in a daily serving of a particular brand of breakfast cereal " we know that the distribution of X is given by:
Part a
For this case the sample size would be n =30 and then the distribution for the sample mean would be given by:
And replacing we got:
Part b
We want to find this probability:
And we can use the z score formula given by:
And replacing we got:
And using the normal standard distribution table and the complement rule we got:
Answer:147.57
Step-by-step explanation: