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Heba Qureshi

Numerade Educator

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Educator Statistics

Numerade tutor for 4 years
216 Students Helped

Heba's Quick Ask Videos

05:10
Calculus 1 / AB

A printer needs to make a poster that will have a total area of
200 in2 and will have 1.0 inch margins on the sides, a 2.0 inch
margin on the top and a 1.5 inch margin on the bottom. What
dimensions will give the largest printed area?
(a) Let P be the printed area. Write P as a function of W and
H.
(b) The poster must have a total area of 200 in2 . Express this
as an equation involving W and H.
(c) Maximize P subject to this constraint. Which values of W and
H maximize P?

02:16
Calculus 3

You deposit $1,000 in an account at the Lifelong Trust
Savings and Loan that pays 4% interest
compounded quarterly. By how much will your deposit have grown
after 8 years (in dollars)? (Round your answer to the
nearest cent.)

03:46
Calculus 3

In the 1st-order linear ODES, explain why do we multiply an
integrating factor?

03:47
Calculus 1 / AB

Glorious Gadgets is a retailer of astronomy equipment. They purchase equipment from a supplier and then sell it to customers in their store. The function C(x) = 1.5x + 33750x^(-1) + 11250 models their total inventory costs (in dollars) as a function of x, the lot size for each of their orders from the supplier. The inventory costs include such things as purchasing, processing, shipping, and storing the equipment.

What lot size should Glorious Gadgets order to minimize their total inventory costs? (NOTE: your answer must be the whole number that corresponds to the lowest cost.)
What is their minimum total inventory cost?

04:58
Calculus 3

Reflect on the concept of composite and inverse functions. What concepts (only the names) did you need to accommodate these concepts in your mind? What are the simplest composite and inverse functions you can imagine? In your day to day, is there any occurring fact that can be interpreted as composite and inverse functions? What strategy are you using to get the graph of composite and inverse functions?

05:36
Calculus 3

In a University of Wisconsin (UW) study about alcohol abuse among students, 100 of the 40,858 members of the student body in Madison were sampled and asked to complete a questionnaire. One question asked was, "On how many days in the past week did you consume at least one alcoholic drink?" (25 points)

Identify the population and the sample. (5 points)

b. For the 40,858 students at UW, one characteristic of interest was the percentage who would respond "zero" to this question. For the 100 students sampled, suppose 29% gave this response. Does this mean that 29% of the entire population of UW students would make this response? Explain. (10 points)

c. Is the numerical summary of 29% a sample statistic or a population parameter? (10 points)

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