How many significant figures do the following number has: $214$?

Combine each pair of sentences by changing the italicized one into an adjective or adverb clause. Use the introductory words given.

Example: Childhood can last a lifetime. Historical records show. (as)

Answer: Childhood can last a lifetime, as historical records show.

In some countries, even marriage didn't make a son independent. He and his family lived with his father. (if)

For each question below, two figures are named, and pairs of congruent parts of the figures are given. Write $\cong$ in the blank if the figures are definitely congruent. If there is not enough information, write? and use the space to the right to sketch a counterexample showing two figures that have the given congruent pairs but are not congruent. Think of each quadrilateral as two triangles and apply principles of triangle congruence. $A B C D \text{\_\_\_\_\_} E F G H : m \angle A=m \angle E=90^{\circ};$ $m \angle B=m \angle F=90^{\circ} ; \overline{A D} \cong \overline{E H} ; \overline{A B} \cong \overline{E F}$

Household ammonia used for cleaning contains about $10 \mathrm{~g}$ (two significant figures) of $\mathrm{NH}_3$ in $100 \mathrm{~mL}$ (two significant figures) of solution. What is the molarity of the $\mathrm{NH}_3$ in solution?

Sketch and label the figures described. Line $\ell$ intersects plane $X$ at point $P$.

Combine each pair of sentences by changing the italicized one into an adjective or adverb clause. Use the introductory words given.

Example: Childhood can last a lifetime. Historical records show. (as)

Answer: Childhood can last a lifetime, as historical records show.

These ideas created two extremes. (because) You could learn an adult trade at age 7 but still be a "child" at age $30$.

Draw a pair of similar figures with areas that have a ratio of $4: 1$. Explain.

(a) How many significant figures are in the numbers 99 and $100 . ?$ (b) If the uncertainty in each number is 1 , what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers: significant figures or percent uncertainties?

Sketch figures. Try to interpet the field of v as a velocity field. v=xi-yj

Give some examples of similar figures you find in everyday life.

(a) How many significant figures are in the numbers 99 and 100.? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express accuracy of these two numbers: significant figures or percent uncertainties?

On the line provided, revise the sentence that would be better in the active voice. Write Correct if the sentence is already in the active voice or if the performer of an action is not known and no change seems necessary. Example 1. We were given an informative tour of the historical district by her.

$$\underline {\color{#c34632}\text{She gave us an informative tour of the historical district.}}$$

The fire station on the town square was built in $1889$.

The vertices of a pair of figures are given. Determine whether a scale drawing is represented by the pair of figures. A(-8, -2), B(-4, 2), C(-4, -2) and G(2, -1), H(4, -1), J(2, -3)

What kind of relationship do you think the two figures have?