A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?What is the value of (0.3)4 ?

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.

it would open into a square depending on the type of envelope i’m not sure about the second part

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1