A) Round 8.6078 to 2 decimal places

8.61

Step-by-step explanation: Since the third decimal (7) is greater than 5, the second decimal is rounded up. Therefore, 8.6078 rounded to two decimal places is 8.61.

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times