There are 8 boys and 12 girls in mr rossi’s class one student will be chosen randomly to represent the class at a conference of seventh grade students what is the probability that the representative will be a girl

0.6 or 60%.

Step-by-step explanation:

Given: There are 8 number of boys in the class.

           There are 12 number of girls in the class.

Now, finding total number of students in the class of Mr Rossi.

Total number of students=

∴ Total number of students in the class=

Next finding the probability of having representative will be a girl.

Probability of having girl=

⇒ Probability of having girl=

∴ Probability of having girl as a representative=

Converting the fraction into decimal, we will get 0.60 and in percentage, we will get 60%.

∴ 0.60 or 60% probability that the representative will be a girl.

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204