City A's population is 15,000; City B's is 12,000. a. City A's population is what percent larger than City B's? b. City B's population is what percent less than City A's? c. City A's population is what percent of City B's? d. City B's population is what percent of City A's?

Find the doubling time in the following exercise.

The population of a city is growing by $26 \%$ per year.

When you shine a laser-beam pointer at a wall, why do you see a dot on the wall but not the beam running from pointer to wall?

How does Frankie learn the remaining verses of "The Highwayman"?

The populations of Cities A and B are $2.6 \times 10^{5}$ and 1,560,000, respectively. The population of City C is twice the population of City B. The population of City C is how many times the population of City A?

The school budget just passed for this year is $4.2 million, which is 10% less than the budget last year. How much was the budget last year?

Work in a small group and gather information and obtain evidence about the relationship between city services and crime rates and then present your conclusions using deductive reasoning.

Find the percent change for each of the following cities: a. The population of City P increased to 125,000 from 100,000. b. City Q's population decreased to 100,000 from 125,000. c. City R's population grew to 87,450 from 72,625. d. City S's population went from 20,125 to 17,750.

Rosie weighs 160 pounds and gains 10%. What percent of her new weight must she lose to get back to 160 pounds?

In changing jobs, Pat increased her hourly take-home pay by 24%, or by $3.48 an hour. What is her new hourly pay, and what was her old one?

Which place did not play a role in the Spanish-American War?

a) Havana

b) San Juan Hill

c) Mexico City

d) Manila Bay

If the box shown represents 75% of an amount, show a box that represents 125% of the same amount. What percent of that box is the given one?

Manila, Philippines, has one of the highest population densities in the world with 111,002 people/ $\mathrm{mi}^2$. Manila's total population is 1,652,171. How large is Manilla, to the nearest tenth of a square mile?

The city with the greatest population density is Manila in the Philippines. The city has a population of $1.8$ million people and an area of $16.6$ square miles. What is its population density in units of people per square mile?