10. A student studied 18 hours in 7 days, if he wants to study average 2 hours each day for 14 days. How many hours he needs to study for next 7 days?

2 x 14 = 28

28 - 18 = 10

He needs to study for 10 hours that week or, about one and half hours per day.

560

hope this : )

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d