Check all that are true about the polynomial function f(x)=x^4-x^2 B. f(x) has a relative maximum of (0,0)

C. f(x) has a double root at x=1

D.(x+1) is a factor of f(x)

F. f(x) is decreasing when x<-1

E. f(x) has a range of [-3,♾)

C. f(x) has a double at x=1

Step-by-step explanation:

i hope it's correct i'm only grade 5

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

89

step-by-step explanation: