Currently, you have made 78, 83, and an 80 on your tests in math. What do you need to make on the next test in order to get an average of an 82?

The student's scores so far add up to 78+83+74+82 = 317

An average score of 80 over 5 tests adds up to 80+80+80+80+80 = 80*5 = 400

400 - 317 = 83

The student needs a score of 83.

87

Step-by-step explanation:

Mean(or average) = 82

let 'x' be the last test marks

Sum of marks of tests/Number of tests = Mean

(78 + 83 + 80 + x)/4 = 82

241 + x = 82 × 4

241 + x = 328

x = 328 - 241

x = 87

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: