Mary wants to fill in a cylinder vase. At the flower store they told her that the vase should be filled for the flowers to
last the longest. Her cylinder vase has a radius of 4 inches and a height of 6 inches. How much water should Mary pour
into the vase?
1. UPLOAD
WRITERS
please help! :)

solution:

total number of question in the competition= 25

marks for each correct answer= 6 points

marks for question left blank= 1.5

marks for incorrect answers=0

number of correct answers by joe= 12

so, marks obtained for correct answers= 12 × 6=72

as, joe guessed   4 of the other questions and randomly guessed on the 9 remaining problems.

so, we are not sure whether how many questions joe has done correctly or incorrectly.

but points awarded for correct as well as incorrect answer is multiple of 0.5.

so, total marks obtained must be also multiple of 0.5.

so, none of the option from (a) to (c) is true.