Find the circumference of the circle with the given radius or diameter. Use - 3.14. diameter = 19 m
A. 29.83 m
B. 283.39 m
C. 59.66 m
D. 1,133.54 m

C) 59.66 m

Step-by-step explanation:

C = pi d

in this case, d=19

so, when you solve, with a negative pi, you get somewhere around 59.66.

because -3.14 times 19 equals 59.69, which is closest to c.

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

where r the answers

step-by-step explanation: