Assume a middle school has 1500 students. During the first nine weeks, 350 students received A's, 475 student received B's, 375 students received C's, 125 students received D's, and 175 students received F's. 1. If you took a sample of 200 students, how many B's would you expect to have in the sample?

A. 23 B's

B. 47 B's

C. 63 B's

D. 153 B's

2. If you took a sample of 200 students, how many D's would you expect to have in the sample?

A. 17 D's

B. 25 D's

C. 47 D's

D. 75 D's

3. If you took a sample of 300 students, how many B's would you expect to have in the sample?

A. 63 B's

B. 75 B's

C. 95 B's

D. 175 B's

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !

a rotation about point l

step-by-step explanation:

quizlet

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.