Find U

Write your answer as an integer or as a decimal rounded to the nearest tenth.
U =

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)