Circumference of a circle:

A circle has a radius of 11 yd. What is its circumference?

Use 3.14 for π, and do not round your answer. Be sure to include the correct unit in your answer.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.