A high-speed aircraft is cruising in still air How does the temperature of air at the nose of the aircraft duter from the temperature of air at some distance from the aircraft?

Sketch the graphs of the lines on the same coordinate plane.

$$y=x+3, \quad y=x+1, \quad y = -x+1$$

Use the cues provided to answer the questions about what people do to help the environment. Follow the model. Modelo: ¿Qué hace Alejandro en el centro de reciclaje? (seguir instrucciones) Sigue las instrucciones del centro de reciclaje. ¿Qué haces tú en casa? (recidar las botellas)

James McDonnell purchases $800$ pounds of potatoes at a cost of $\$0.18$ per pound. If he anticipates a spoilage rate of $20\%$ of the potatoes and wishes to make a profit of $140\%$ of the cost, for how much must he sell the potatoes per pound?

The color of heated steel is used to estimate its temperature during forging and heat-treating. The approximate temperature in degrees Celsius for heat-treated steel in cherry red is $718{\degree} \mathrm{C}$. Use the Fahrenheit scale to calculate this temperature. Three significant digits should be used.

Consider the following EOS, expressed in terms of reduced pressure and temperature: Z = 1 + (Pr/14Tr)[1 − 6Tr −2]. What does this predict for the reduced Boyle temperature?

James is trying to shoot three balls of different sizes consecutively through a hoop with a diameter of 18 inches. The balls have volumes of $850 \pi, 900 \pi$, and $950 \pi$ cubic inches. How many of the balls will fit through the hoop?

Graph some curves of constant temperature (“isotherms”) and indicate directions of heat flow by arrows when the temperature equals (a) x³-3xy², (b) sin x sinh y, and (c) e^x cos y.

Bicycling World, a magazine devoted to cycling, reviews hundreds of bicycles throughout the year. Its Road-Race category contains reviews of bicycles used by riders primarily interested in racing. One of the most important factors in selecting a bicycle for racing is its weight. The following data show the weight (pounds) and price ($) for ten racing bicycles reviewed by the magazine:$

$$\begin{array}{lcc} \text { Model } & \text { Weight (lbs) } & \text{ Price (\$) } \\ \text { Fierro 7B } & 17.9 & 2200 \\ \text { HX 5000 } & 16.2 & 6350 \\ \text { Durbin Ultralight } & 15.0 & 8470 \\ \text { Schmidt } & 16.0 & 6300 \\ \text { WSilton Advanced } & 17.3 & 4100 \\ \text { bicyclette vélo } & 13.2 & 8700 \\ \text { Supremo Team } & 16.3 & 6100 \\ \text { XTC Racer } & 17.2 & 2680 \\ \text { D'Onofrio Pro } & 17.7 & 3500 \\ \text { Americana \#6 } & 14.2 & 8100 \end{array}$$

$Test whether each of the regression parameters$\beta_0$and$\beta_1$is equal to zero at a$0.05$ level of significance. What are the correct interpretations of the estimated regression

Division by a negative integer can be illustrated with colored counters if division is described by repeated subtraction. For example, $12\div( -4) = 3$ is done this way:
Start with a loop of $12$ red counters and show that three groups, each with four red counters, can be removed.
Write a lesson on division by a negative integer using this model.

Complete the following statements mentally.

$36$ is $25 \%$ of ___.

*Dolbear's Law states the relationship between the rate at which Snowy Tree crickets chirp and the air temperature of their environment. The formula is* $$ T=50+\frac{N-40}{4} $$ where: $\\$ **T** = temperature in degrees Fahrenheit and$ $$ **N** = number of chirps per minute $$ $If$T=65^${\circ}$ $$ \mathrm{F}$, find the number of chirps per minute. $$

Find the points on the graph of $f(x)=x^2-4 x+3$ that have tangent lines with a slope of $-2$.

Consider an air-standard jet engine cycle operating in a 280-K, 100-kPa environment. The compressor requires a shaft power input of 4000 kW. Air enters the turbine state 3 at 1600 K and 2 MPa, at the rate of 9 kg/s, and the isentropic efficiency of the turbine is 85%. Determine the pressure and temperature entering the nozzle.