Scrapie is a degenerative disease of the nervous system. a study of the substance idx as a treatment for scrapie used as subjects 28 infected hamsters. fourteen, chosen at random, were injected with idx. the other 14 were untreated. the researchers recorded how long each hamster lived. they reported: thus, although all infected control hamsters had died by 94 days after infection (mean +/-sem=87.1 +/-1. idx-treated hamsters lived up to 108 days(mean +/- sem=98 +/-2.57). readers are supposed to know that sem stands for standard error of the mean.(a) for the group injected with idx, find: the mean, x bar= standard deviation, s=) for the untreated grop, find: the mean, x bar= standard deviation, s= include a step by step way to solve this using a ti-84 plus as well as any other methods that you have handy. this will me both understand it and save time. in advance.

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!