The radius of a circle is 15. Using π, which equation expresses the ratio of the circumference to the diameter of a circle?

radius of circle = 15

circumference of circle  = 2πr

                                        = 2*22/7*15

                                        = 44/7*15

                                        = 660/7

                                       = 94.28

diameter of circle = 2r

                              = 2(15)

                              = 30

RATIO = 94.28:30

last option: rhombus or kite

step-by-step explanation:

a kite and rhombus have the same shape. as we don't have any specific formula for the calculation of area of kite. the diagonals are used to calculate the area of a kite or rhombus.

the formula for area of rhombus is given by:

here, d_1 is the first diagonal and d_2 is the second diagonal.

so,

last option is the correct answer ..

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3