Numerade

Questions asked

BEST MATCH

A large online store prides itself on its fast response to email questions to its technical department. A recent sample of 21 sample emails showed that the mean time for the technical department to respond was 49.00 hours with a standard deviation of 7.00 hours. The store has recently hired more staff members, and wants to know if the time to respond to emails has dropped from last year's average of 52.43 hours. At the 0.05 significance level, is it reasonable to conclude the average response time is less than last year's average? Follow the steps below to answer this question.

View Answer

BEST MATCH

Consider a circuit containing a 83.7 pF capacitor and a 62.6 MS resistor.

View Answer

BEST MATCH

Which terrestrial ecosystem or life zone produces the highest net primary productivity per year? Select one: O a. tundra b. savanna O c. swamps and marshes O d. temperate forest

View Answer

BEST MATCH

what is an electric field? what are the units for an electric field? list both of them

View Answer

BEST MATCH

The saying "variety is the spice of life" describes consumer preferences for _____. [14.2.3 Monopolistic Competition versus Perfect Competition] A better service B more convenient locations C lower prices D product differentiation

View Answer

BEST MATCH

Question content area left Part 1 Find the half-life of a radioactive element, which decays according to the function A(t) = A₀e^(-0.0134t), where t is the time in years. Question content area right Part 1 The half-life of the element is enter your response here years. (Round to the nearest tenth.)

View Answer

BEST MATCH

Find the number of linearly independent vectors on the following list v₁ = [[4],[2]], v₂ = [[4],[2]], v₃ = [[20],[10]] Find the number of linearly independent vectors in the list v₁, v₂, v₃. rank([v₁, v₂, v₃]) = (select value from the list) Find any numbers x₁, x₂ which satisfy the following equation v₃ = v₁^x₁ + v₂^x₂ x₁ = x₂ = Find the number of linearly independent vectors on the following list [4] [2] [20] [10] Find the number of linearly independent vectors in the list 1, 2, 3 rank[v₁, v₂, v (select value from the list) Find any numbers i, which satisfies the following equation V₃ = V₁*X₁ + V₂*2 x₁ = 32

View Answer

BEST MATCH

3 attempts remaining. With an initial deposit of 400 dollars, the balance in a bank account after t years is f(t)=400(1.05)^(t) dollars. What are the units of the rate of change of f(t)? Find the average rate of change over [0,1]. Answers (in progress)

View Answer

BEST MATCH

The text provided does not contain any spelling, typographical, grammatical, OCR, or mathematical errors.

View Answer

BEST MATCH

Problem 4: MRI Superconductivity In MRI machines, a *very* strong, and very spatially uniform magnetic field is needed to be able to image the body. The electromagnet generating the current that creates the magnetic field takes advantage of an exotic physics phenomenon known as superconductivity, where extremely high currents can be passed through materials with exactly zero resistance. However, superconductivity was a pretty recent discovery (~1970s or '80s) -- without superconductivity, MRI machines become extremely expensive to operate due to the cost of electricity. In this problem, we'll explore that, by considering what it takes to run an MRI machine on 'normal' conductivity materials. a) A typical clinical MRI creates a 1.5 Tesla magnetic field (very strong!). To image an entire body, the solenoid (coil of wires) should be about 1 meter in diameter, and 2 meters in length (that way a typical human body can fit into the solenoid, and with some space to spare to avoid claustrophobia). If the thickest copper wire you can buy is #6 gauge, how many loops wire do you need to cover the whole 2 meter length?

View Answer

taylor s.