91Ó°ÊÓ

Identify each sample as biased or unbiased and describe its type. Explain your reasoning. To determine the theme for the homecoming dance, the homecoming committee surveys one classroom.

Find the percent of change. Round to the nearest tenth, if necessary. Then state whether the percent of change is a percent of increase or a percent of decrease. from \(\$ 228\) to \(\$ 251\)

Express each ratio as a fraction in simplest form. 10 inches to 3 feet

The cost of 13 gallons of gasoline is 32.37 dollars. Write an equation relating cost to the number of gallons of gasoline. How much does 18.5 gallons of gasoline cost?

Express each percent as a fraction or mixed number in simplest form and as a decimal. $$12 \frac{1}{2} \%$$

Find the percent of change. Round to the nearest tenth, if necessary. Then state whether the percent of change is a percent of increase or a percent of decrease. from 45 in. to 18 in.

Express each ratio as a fraction in simplest form. 5 feet to 5 yards

Find the percent of change. Round to the nearest tenth, if necessary. Then state whether the percent of change is a percent of increase or a percent of decrease. from \(80 \mathrm{cm}\) to \(55 \mathrm{cm}\)

Express each percent as a fraction or mixed number in simplest form and as a decimal. $$62 \frac{1}{2} \%$$

Express each percent as a fraction or mixed number in simplest form and as a decimal. $$125 \%$$