Bill wrote this expression in his notebook.

Where could he place brackets for the value of the expression to be equal to 33?

A.
10 − 4 + [3 × 18 − 9]
B.
10 − 4 + 3 × [18 − 9]
C.
[10 − 4] + 3 × 18 − 9
D.
[10 − 4 + 3] × 18 − 9

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?