7th Semester Review

Front

What is the formula to find the circumference of a circle?

Back

The circumference (C) of a circle is calculated using the formula: C = πd, where d is the diameter.

Front

If the diameter of a circle is 40 cm, what is the circumference using π ≈ 3.14?

Back

C = πd = 3.14 * 40 = 125.6 cm.

Front

How do you find the cost of multiple items if you know the cost of a certain quantity?

Back

To find the cost of multiple items, use the unit price. If 5 pizzas cost $60, the cost per pizza is $60/5 = $12. Therefore, 9 pizzas cost 9 * $12 = $108.

Front

What is the area of a square?

Back

The area (A) of a square is calculated using the formula: A = side^2.

Front

How do you calculate the area of a half-circle?

Back

The area (A) of a half-circle is calculated using the formula: A = (1/2)πr^2, where r is the radius.

Front

What is the relationship between the area of a square and a half-circle when combined?

Back

To find the total area of a shape that includes both a square and a half-circle, calculate the area of each separately and then add them together.

Front

What does the point (0,0) represent on a graph of sales?

Back

The point (0,0) indicates that no sales were made; if no apples are sold, Henry does not make any money.

Front

What is proportionality in mathematics?

Back

Proportionality means that two quantities increase or decrease at the same rate. If y is proportional to x, then y = kx, where k is the constant of proportionality.

Front

How do you find the constant of proportionality?

Back

To find the constant of proportionality (k), divide y by x when y is proportional to x: k = y/x.

Front

If x = 12 and y = 3, what is the constant of proportionality?

Back

k = y/x = 3/12 = 1/4.