Which action can you take to determine whether your identity has been stolen?A.
Call the credit card company’s customer service department to update your contact information.
B.
Change your online bank account password so it can’t be easily guessed.
C.
Keep all financial records, Social Security cards, and ID cards in a safe place.
D.
Review your credit report to make sure there are no unauthorized open accounts.
E.
Shred papers that contain any personal or medical information.

3.5 belongs to Rational number sets mainly and also belongs to Real Numbers.

Step-by-step explanation:

Number Sets are nothing but group of number classified into groups.

They are Natural, Whole, Integers, Rational, Irrational and Real numbers.

Natural number set = {1,2,3...},

Whole number set= {0,1,2,3...},

Integers = { ....-2, -1, 0, 1, 2, ....},

Rational numbers = { Integers, Decimals, Fractions},

Irrational numbers = { non fractional numbers eg: π, etc.}

Real = { Natural, Whole, Integers, Rational, Irrational }.

Any number which is a fraction resulting in a decimal value is Rational Number sets.

3.5 is a decimal number so it can be Rational Number sets also Real Number sets.

m(ar ABD) = 54°

Solution:

The image of the question is attached below.

Given data:

m∠BCD = 21° and m(ar EF) = 33°

By central angle theorem,

The measure of a central angle is equal to the measure of the intercepted arc.

m (ar EF) = m∠ECF

m∠EFC = 33°

By vertical angle theorem,

If two lines are intersecting, then vertically opposite angles are equal.

⇒ m∠ACB = m∠ECF

⇒ m∠ACB = 33°

m∠ACD = m∠ACB + m∠BCD

              = 33° + 21°

m∠ACD = 54°

By central angle theorem,

m(ar ABD) = m∠ACD

m(ar ABD) = 54°