A12.2 Advanced Weekly Review

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Front

What does the term 'scale' mean in modeling?

Back

Scale refers to the ratio of the model's size to the actual size.

Front

If 1 inch represents 2.5 feet in a scale model, how many feet does 6 inches represent?

Back

6 inches represents 15 feet (6 inches x 2.5 feet/inch).

Front

What is the relationship between hours worked and money earned if you earn $8.50 per hour?

Back

The relationship is linear, represented by the equation m = 8.50t.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if one quantity is a constant multiple of another.

Front

How do you convert feet to inches?

Back

Multiply the number of feet by 12 (since 1 foot = 12 inches).

Front

What is the formula for calculating the area of a circle?

Back

A = πr², where A is the area and r is the radius.

Front

If a model is created at a scale of 1:10, what does this mean?

Back

It means that 1 unit on the model represents 10 units in real life.

Front

What is the equation for a proportional relationship?

Back

y = kx, where k is the constant of proportionality.

Front

How do you find the length of a model if the actual length is known and the scale is given?

Back

Use the formula: Model Length = Actual Length x (Model Scale / Actual Scale).