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

this answer is !

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560