So to find the answer of the area, you have to multiply 7 and 8 which would equal to 56.
Answer: C) Cannot be done
Taking the square root of a negative number is not possible unless you involve complex numbers. If your teacher has not introduced that topic yet, then you just simply say "cannot be done" or something along those lines.
30.
3/4 is equal to 75%, so take 75% of 40 by multiplying .75 by 40 to get 30
Answer:
The answer is would be 1.2 or 1.22
The converted to radians is 4(pi)