15. If the circumference of a circle is 10t inches, what is the area, in square inches, of the circle?
A. 10 pi
B. 25 pi
C. 50 pi
D. 100 pi

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

Given abcd ac=38 and ae=3x+4 find the value of x

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.