You know the Drill! FIRST CORRECT ANSWER WILL GET BRAINLIEST! No guesses or what you think.

Hint # 2 - Subtract the area of the triangle and the area of the square from the area of the
rectangle.

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75 cm^2

Step-by-step explanation:

The large rectangle

A = l*w

A = 12 * 8 = 96

Subtract the corner missing from the top right

A = 3*3 = 9

Subtract the triangle missing from the left

A = 1/2 bh = 1/2 *8 *3 = 12

Total area

A = 96 - 9 - 12

75 cm^2

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.  

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b