To obtain a grade A, Youseff's mean score in five tests must be 85 or more. Youseff has
scored 86, 94, 75 and 88 in four tests.
What is his minimum mark in the fifth test
to get a grade A?
The minimum mark in the fifth test should be

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse