$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Solve.

$$4x + 2x = 9x - 6$$

$\text{\red{Review}}$ What are the three main organs of seed plants?

If you stake out a plot of land with a steel tape measure using map measurements on a very hot day, will you enclose more or less land than on a very cold day?

What are geographical data? Briefly describe at least two ways to display geographical data. Be sure to explain the meaning of contours on a contour map.

The composite shaft shown in Figure P6.71/72 consists of a stainless steel tube (1) and a brass tube (2) that are connected at flange $B$ and securely attached to rigid supports at $A$ and $C$. Stainless steel tube (1) has an outside diameter of $2.25$ in., a wall thickness of $0.250$ in., a length of $L_1=40$ in., and a shear modulus of $12,500 \mathrm{ksi}$. Brass tube (2) has an outside diameter of $3.500$ in., a wall thickness of $0.219$ in., a length of $L_2=20$ in., and a shear modulus of $5,600 \mathrm{ksi}$. If a concentrated torque of $T_B=42 \mathrm{kip}$-in. is applied to flange $B$, determine (a) the maximum shear stress magnitudes in tubes (1) and (2). (b) the rotation angle of flange $B$ relative to support $A$.

A flat, solid cylindrical grinding wheel with a diameter of 20.2 cm is spinning at 3000 rpm when its power is suddenly turned off. A workman continues to press his tool bit toward the wheel's center at the wheel's circumference so as to continue to grind as the wheel coasts to a stop. If the wheel has a moment of inertia of $4.73\ \mathrm{kg} \cdot \mathrm{m}^{2}$ (a) determine the necessary torque that must be exerted by the workman to bring it to rest in 10.5 s. Ignore any friction at the axle. (b) If the coefficient of kinetic friction between the tool bit and the wheel surface is 0.85, how hard must the workman push on the bit?

Analyzing Maps Study the map of Military Districts on page $394$. Then list the Confederate states that were readmitted to the Union in $1868$, the earliest year for any such state to gain readmission.

Review the paragraph that describes the term Great Depression. What is the meaning of the word depression as used in this context?

State the maximum number of electrons that can occupy the following orbitals.

$3 d$

How many electrons will each element gain or lose in forming an ion? Fluorine

$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Write as an algebraic expression.

$5$ more than $t$

$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Solve.

$$-11w = -132$$

$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Solve.

$$\dfrac{c}{6} = 12$$

$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Give the reciprocal.

$$\dfrac{5c}{8}$$