Which real number does not have a multiplicative inverse and why?

0 is the real number for which there is no multiplicative inverse.

Solution:

Need to find a real number not having multiplicative inverse. Let’s first understand what is multiplicative inverse.

Multiplicative inverse of a real number is that number which when multiplied to the real number gives result as 1.

That is product of real number and multiplicative inverse is always 1.

Can you imagine any real number which whatever be the case, when multiplied by any number will never give result as 1.

Think about 0.

Whenever any number multiplied by 0, result is always zero. So there will never be a case when zero multiplied by any number gives result as 1.

Hence 0 is that real number for which there is no multiplicative inverse.

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

this answer is !