For
reading the fraction like f(x)/h only (f(x+h) start fraction f(x) / h end fraction), the answer is 
That angle would also be 45
So scientific notation is
(number>1 and <10) times 10^xpower
so count how many decimal places the decimal needs to move to make 76994 >1 and <10
it needs to move 4 places so
7.6994 times 10^4
the answer is A