Ronny read for 2.75 hours yesterday his older brother read for 1.18 hours and his younger brother read for 0.43 hours.

round each time to the nearest tenth of an hour.

about how long did the three brothers read yesterday altogether?

a.
about 1.2 hours

b.
about 1.6 hours

c.
about 4.2 hours

d.
about 4.4 hours

4.4 hours

Step-by-step explanation:

Since Time taken by Ronny=2.75 is nearest to 2.8

Time taken by older brother=1.18 is nearest to 1.2

Time taken by younger brother=0.43 is nearest to 0.4

Hence after round off the time taken by all of the boys to the nearest tenth

The total time taken by all brothers to read=2.8+1.2+0.4 = 4.4 hours

Thus, the three brothers read for 4.4 hours yesterday altogether.

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!