The answer is 245 remainder 17
Use exp/log functions to rewrite y as

One of the properties of logarithms lets us bring down the exponent, so

Now take the derivative of both sides with respect to x. By the chain and quotient rules,

Simplify:

It's D.30 because 600 divided by 20 is 30 or u can multiply 30 x 20 = 600.
the answer is 1,102.5, to find the area of a triangle you need to multiply LxWxB/2
Let the score on her seventh test be "x".
SO,

∴ He must get 104% on his seventh test to get an average score of 90%