|76| is 76 because it is 76 units away from zero.
35 students. 150 divided by 30 is 5 that means you'll multiply 7 by 5 and getting 35.
For b), the answer is 3^2 / 2^7
you just have to multiply the exponent of 2 with 2 and add it with 3
for c), the answer is -(3)^3
notice that the negative sign is outside the parenthesis
for d), the answer is 1
you just multiply -n with 3 and all the exponents since they all have the same base
for e), the answer is 2a^2 b
just distribute the exponent 2 to all the bases and cancel out the things that can be cancelled or just subtract exponents of the same bases if the operation is division
for f), the answer is b^4 / 2b^4
focus first on the things inside the parenthesis, then take not of the -1 exponent after
I believe the answer is 8.7 but im not 100% sure.
This is called a line <-------------------->. Hope it helps!