In a recent study, the Centers for Disease Control and Prevention reported that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.5 and standard deviation 9.9.

For parts (a) and (c), make sure to draw a standard normal curve and shade the appropriate areas.

a) What proportion of women have blood pressures lower than 75?

b) Michelle’s diastolic blood pressure is in the 85th percentile of all adult women. What is her blood pressure?

c) If a group of 25 women is selected, what’s the probability that the mean diastolic blood pressure of these 25 women is lower than 75?

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

b mark me branliest thx

step-by-step explanation:

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

answer: 4 (:

step-by-step explanation: