Ineed geometry i don't know what is the correct classification for ∠bec? i can't tell if it's straight, acute, obtuse, or a right angle.

Angle BEC is the unmarked angle in the middle of the figure. Its value is the difference between straight angle AED (180°) and the two marked angles, 57° and 33°. That difference is ...

... 180° - 57° -33° = 90°

∠BEC is a right angle.

Right angle

Step-by-step explanation:

We are given that

Angle AEB=

Angle CED=

We have to find  the classification of angle BEC

We know linear sum =

Angle AEB +Angle BEC+Angle CED=180

Substitute the values then we get

Hence, the angle BEC is right angle

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)