2022-03-09
Answered

find the length of the curve(r=2+4*cos(t))

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nick1337

Answered 2022-03-22
Author has **510** answers

You didn't specify limits, so I took 1 and 0

asked 2022-05-09

Identify each of the following statements as true or false in relation to confidence intervals (CIs). **Note: 0.5 marks will be taken away for each incorrect answer. The minimum score is 0.**

True | False | |
---|---|---|

A 95% CI is a numerical interval within which we are 95% confident that the true mean μ$\mu $ lies. | ||

A 95% CI is a numerical interval within which we are 95% confident that the sample mean x¯¯¯$\overline{x}$ lies. | ||

The true mean μ$\mu $ is always inside the corresponding confidence interval. | ||

For a sample size n=29$n=29$, the number of degrees of freedom is n=30$n=30$. | ||

If we repeat an experiment 100 times (with 100 different samples) and construct a 95% CI each time, then approximately 5 of those 100 CIs would not$not$ contain the true mean 𝜇. |

asked 2022-03-17

asked 2022-04-14

discrete math

functions pegeonhole principle

How many multiples of 6 are in the set $\{171,172,173,..,286\}$ ?

asked 2022-03-17

At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by 𝜃(𝑡) = (250 𝑟𝑎𝑑/𝑠 )𝑡 − (20.0 𝑟𝑎𝑑/𝑠 2 )𝑡 2 − (1.50 𝑟𝑎𝑑/𝑠 3 ) 𝑡 3 . (a) At what time is the angular velocity of the motor shaft zero? (b) Calculate the angular acceleration at the instant that the motor shaft has zero angular velocity. (c) How many revolutions does the motor shaft turn through between the time when the current is reversed and the instant when the angular velocity is zero? (d) How fast was the motor shaft rotating at t=0 when the current was reversed? (e) Calculate the average angular velocity for the time period from t=0 to the time calculated in part (a). A

asked 2022-04-04

**Let a and b be coprime integers, and let m be an integer such that a | m and b | m. Prove that ab | m**

asked 2022-04-16

How many strings are there of lowercase letters of length four or less, not counting the empty string?

asked 2022-05-16

5) Find the least integer n such that f (x) is O(n^x) for each of these functions.

c. f(x) = (x4 + x2 + 1)/(x3 + 1)