The life span of a certain bacteria is 22 hours, with a standard deviation of 1.5 hours. In a random sampling of 5,000 bacteria, how many would you expect survive between 19 and 22 hours A) 3400
B) 1700
C) 4750
D) 2375

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

i'm not really sure how to answer that

step-by-step explanation: