Jessica solved the radical equation Va-9 = 4. Her math work is shown in the table. Step
Justification
Va-9=4
Given
Step 1 (Va-9)2 = (4)2
Square both sides
Step 2 a -9 = 16
Simplify
Step 3 a - 9 + 9 = 16 + 9 Add 9 to both sides
Step 4 a = 25
Simplify
Step 5 25 -974
Check for extraneous solutions
In which step did Jessica make her first error? (1 point)
Step 2
Step 3
O Step 4

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

answer: 0.26

i used the calculator on google

because that’s us why