Can someone explain this please?

A technician can test video player chips at the rate of -3t^2 +16t+5 chips per hour (for≤0 ≤t ≤6), where t is the number of hours after 9:00 am. How many chips can be tested between 11:00 am to 3:00 p. m.? (assume t=0 for 9:00 a. m.)

17 chips

Step-by-step explanation:

The equation that models the situation is

Between 11:00 am, to 3pm, 4 hours have passed.

We substitute t=4 to get:

Therefore between 17 chips can be tested between 11:00 am to 3:00 p.m

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.