1)
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? (round to the nearest whole
number) 87

16

Step-by-step explanation:

Number of problems in the math test = 20

The student earned 80%

Therefore

Number of problems answered correctly in the test by the student

= 80% of 20

Make 80% a decimal

= 80/100 x 20

= 0.8 x 20

= 16

The student answered 16 questions correctly

6 meters

step-by-step explanation:

m∠a is 90°

m∠b is 40°