7. Two different rifles are tested at the shooting range. 190 shots were fired from the first rifle and the target was hit 158 times. 140 shots were fired from the second rifle, with 107 hits. Construct a 95% confidence interval for the difference in the two rifles accuracy. Use the z-values rounded to two decimal places to obtain the answers.

i believe the answer is d.

hope it you! : d

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!