In july 2008 the us national institutes of health announced that it was stopping a clinical study early because of unexpected results. the study population consisted of hiv-infected women in sub-saharan africa who had been given single dose nevaripine (a treatment for hiv) while giving birth, to prevent transmission of hiv to the infant. the study was a randomized comparison of continued treatment of a woman (after successful childbirth) with nevaripine vs. lopinavir, a second drug used to treat hiv. 240 women participated in the study; 120 were randomized to each of the two treatments. twenty-four weeks after starting the study treatment, each woman was tested to determine if the hiv infection was becoming worse (an outcome called virologic failure). twenty-six of the 120 women treated with nevaripine experienced virologic failure, while 10 of the 120 women treated with the other drug experienced virologic failure complete the hypothesis test and state an appropriate conclusion.

because they could drop even lower..

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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