Numerade

Questions asked

BEST MATCH

An air conditioner expels 4.83 105 J of heat to the outside. If the indoor temperature is 16.2\deg C and the outside temperature is 40\deg C calculate the amount of heat the air conditioner removes from inside the house. 5.86e6 Incorrect: Your answer is incorrect. How is the heat removed from the cold environment related to the hot and cold temperatures? What units should you use for the temperatures? J

View Answer

BEST MATCH

A game involving chance is said to be fair if the expected amount won or lost is zero. Consider the following arcade game. A player pays $3 and chooses a number from 1 to 10. A spinning wheel then randomly selects a number from 1 to 10. If the numbers match, the player wins $26. Otherwise, the player loses the $3 entry fee. (a) Define a random variable $W$ that is the amount won by the player and draw its probability distribution. (Capital letters other than $X$ can be used for random variables.) Use negative values for losses and positive values for winnings. (b) Find the mean of $W$. Is this a fair game? (a) Define the random variable $W$ and draw its probability distribution. Choose the correct answer below. $P(W = 26) = 0.1$ and $P(W = -3) = 0.9$ (b) Find the mean of $W$. $\mu = -0.4$

View Answer

BEST MATCH

Suppose that the relation S is defined as follows. S = \{(7, m), (5, m), (9, 5)\} Give the domain and range of S. Write your answers using set notation. domain range =

View Answer

BEST MATCH

Given the equation of a surface S $g(x, y, z) = x^2 + 3 \cdot x \cdot y + y^2 - z = 0$ find the partial derivatives $g_x$ and $g_y$. $g_x = $ $g_y = $ The equation of the tangent plane to S at the point (2, 1, 11) is $a \cdot x + b \cdot y - z = d$, with $a = $ $b = $ $d =

View Answer

BEST MATCH

8. Show that $f(x) = x\ln x - x$ has no inflection points.

View Answer

BEST MATCH

Explain why 12-step and other self or mutual help groups are non-clinical

View Answer

BEST MATCH

Direct Labor Variances Bellingham Company produces a product that requires 6 standard direct labor hours per unit at a standard hourly rate of $20.00 per hour. If 4,200 units used 25,700 hours at an hourly rate of $19.00 per hour, what is the direct labor (a) rate variance, (b) time variance, and (c) cost variance? Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number. a. Direct labor rate variance b. Direct labor time variance c. Direct labor cost variance

View Answer

BEST MATCH

Consider a system model given by \frac{d^2x(t)}{dt^2} = t x(0) = 1 \frac{dx(t)}{dt}|_{t=0} = 2. What is the forced response? $\circ$ 1 $\circ$ $2t^3 + 3t + 1$ $\circ$ $\frac{1}{6}t^3 + 2t$ $\circ$ $\frac{1}{6}t^3 + 2t + 1$ $\circ$ $\frac{1}{6}t^3$ $\circ$ $2t + 1$

View Answer

BEST MATCH

Moving to another question will save this response. Question 11 For the filtered bridge rectifier with the load as shown in the figure, given the peak secondary voltage ($V_p(sec)$) equals 50V, and the input frequency equals 60Hz, find the peak ripple voltage, $V_r$ (pp) 60 Hz 2.257 V 14.72 V 23.93 V none of the choices Moving to another question will save this response.

View Answer

BEST MATCH

Prove the following equality using induction on $n$:¹ $(1 - r)(1 + r + r^2 + ... + r^{n-1}) = 1 - r^n$ for all $n \in \mathbb{N}$. 1. Check the base case ($n = 1$). 2. Prove the inductive step. 3. Using Eq. (1), evaluate the following sum: $3^n + 2 \cdot 3^{n-1} + 2^2 \cdot 3^{n-2} + ... + 2^n = ???$

View Answer

teresa a.