Megan's science teacher gave each student in her class a 20.0 gram sample of sedimentary rock. each student is required to verify the rock sample by taking four mass measurements. which measurement is the most accurate of the four recorded?
a) 19.012 grams
b) 19.0122 grams
c) 19.02 grams
d) 19.12 grams

The correct answer is option D.

Step-by-step explanation:

We are given a sample of 20 gram of the sedimentary rock. the mass recorded by student 4 times is given as follows and we need to find the most accurate value amongst the given one.

Most accurate observation is defined as the observation which is closest to the theoretical value. From the given observations, the closest value to 20.0 gram is 19.12 grams.

Hence, the correct answer is option D.

the answer is 1030 it's very simple math.

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!