4.2 because it has a box around the corner that makes it whole
75+35+25-75= $60 is the account balance
The scientist can use only the angle x and the distance y to calculate the distance between the Earth and the Sun using the cosine function.
cos x = BC / y
Solving for BC
BC = y cos x
BC is the distance between the Earth and the Sun :D
What the composite function in the question is actually trying to explain is;
First of all, in the function
, we will find a result by writing
where we see the letter
.
We will write this result in the
function where we see the letter
and we will get the result.