Is the real number √1.21 rational or irrational? a) rational b) irrational

A) Rational.

Step-by-step explanation:

We have been given a real number . We are asked to determine whether our given number is rational or irrational.

We know that an irrational number is a number that cannot be written as fraction.

Upon evaluating our given number, we will get:

We can write 1.1 as fraction as shown below:

Since we can write our given number a fraction, therefore, our given number is a rational number and option A is the correct choice.

1/5^2 = 7.56/45

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.