You need to remember your exponent rules. I don’t know any easier way to do it. These are all the ones I can remember right now
Answer:
B.28, 4 + (6*4) = 24 + 4 = 28
The nearest million is 46 million since if the number to the right of "nearest so and so" is less than 5, you round down but if it is 5 or more then you round up.
Hope this helps!
6=3 : 16=6 14=6 that should be right