Hand disinfection is frequently recommended for prevention of transmission of the rhinovirus that causes the common cold. in particular, hand lotion containing 2% citric acid and 2% malic acid in 70% ethanol (hl+) has been found to have both immediate and persistent ability to inactivate rhinovirus (rv) on the hands in an experimental setting. is hand disinfection effective in reducing the risk of infection in a natural setting? a total of 212 volunteers were assigned at random to either the hl+ group, which used the hand lotion every three hours or after hand washing, and a control group, which was asked to use routine hand washing but to avoid the use of alcohol-based hand sanitizers. here are the data on the numbers of subjects with and without rv infection in the two groups over the 10-week study period: is this an experiment or an observational study? a. experiment. b. observational study23. do the data give good evidence that hand sanitizers reduce the chance of an rv infection? a. yes, it give a good evidence that hand sanitizers reduce the chance of an rv infection. b. no, it doesn't give a good evidence that hand sanitizers reduce the chance of an rv infection. c. we do not have enough evidence.

i am currently in the exact same situation rn. algebra2/adv algebra is killing

step-by-step explanation:

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4