Step-by-step explanation:
Since we have given that
Amount of pay rate =$21
If she marked up by 78.7% , so it becomes

So, our amount for pay rate becomes

Now, he said he made a profit of 10%,so it becomes

So, our new pay rate becomes

This is the step through which we can get $41.28.
If you look at the rectangle properly, you can see that the diagonal creates two triangles, and if we only focus on one triangle, we can see that the bad of the triangle is 7 and the perpendicular height is 4
Using Pythagorean theorem we can figure out the hypotenuse, or the diagonal
C squared is equal to a squared plus b squared
7^2+4^2 is 65
Square root of 65 is 8.1
I might be wrong but try 150 as an answer hope this helps.
Answer:
The answer is A 3/4
Step-by-step explanation:
If you have 12 pennies and 3 are Canadian then that 9/12 that aren't Canadian. 12 divided by 3 is 4 and 6 divided by 3 is 3 making it 3/4 when it's simplified