Answer: 16 questions
Step-by-step explanation:
To find how many problems the student correctly answered on the test, we can turn 80% into a fraction.

The student answered 16 questions correctly.
The value of (0.3)^4 is 0.0081.
Unless you mean 0.3*4, then it is 1.2.
Distance formula is derived from the Pythagorean theorem. To find the distance between two points (x1,y1) and (x2,y2), all that you need to do is use the coordinates of these ordered pairs and apply the formula to those points. So the formula would be:D=square root symbol(X1-X2)2+(Y1-Y2)2. Hope I've helped you any